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For centuries bees, among the  (hard) working creatures on the planet, have benefited people, plants and the environment.

Under the theme "Bee engaged in pollinator-friendly agricultural production", World Bee Day 2023 calls for global (act) to support pollinator-friendly agricultural production and highlights the importance of preserving bees and other pollinators (传粉者), (particular) through evidence-based agricultural production practices.

The global World Bee Day ceremony,  was held in hybrid format at the FAO headquarters on Friday, 19 May, is  opportunity to raise awareness of the importance of adopting pollinator-friendly agricultural production practices  (protect) bees and other pollinators, while contributing to the resilience, sustainability and efficiency of agrifood systems.

By  (observe) World Bee Day each year, we can raise awareness on the essential role bees and other pollinators play in keeping people and the planet  (health) and on the many challenges they face today. We  (celebrate) this day ever since 2018, thanks to the efforts of the Government of Slovenia with the support of Apimondia, which led the UN General Assembly to declare 20 May  World Bee Day.

In the mid-20th century, boys could study technical subjects while girls were expected not. However, Bell Burnell's parents challenged these1 , which enabled her to study science. Bell Burnell knew before leaving school that she wanted to be a radio astronomer. That2 led her to go to the University of Glasgow, where she was the only3 in her class. After graduation, Bell Burnell went to Cambridge University, where she yet again had to prove that she4 .

Her first project, working with her thesis supervisor (论文导师) Hewish, was 5 certain objects called quasars (类星体). It was 6 to have a female student on this project. Bell Burnell herself has said that the only other females 7 were secretaries. At this stage, it was she who 8 the telescope and analyzed the data.

One day, checking on the data, Bell Burnell saw a signal that she couldn't9 . To understand what it was she ended up bringing this10 to Hewish, who said it was interference. He thought that Bell Burnell had wired up the radio telescope11 and that is why the new signal had appeared. However, she saw the signal again afterwards.12 , she tried to reach Hewish. Once he13 the pulse with his own eyes, he knew it wasn't interference, and a new research project began. But, with just one pulse it was hard to have a(n)14 discovery.

A couple of days later, Bell Burnell was in her study, and she saw something 15 to the first pulse, and thus 2 pulsars were discovered.

To create paper and other wood products, millions of new trees must be planted each year. 

Don't use products that come with excessive (过度的) packaging.

A candy may come in an individual wrapper (包装纸), within a bag that's also placed inside a box. Buy items that haven't been wrapped several times. Next time you or your family go shopping, make sure you take reusable bags and buy things without packaging.

Another large cause of paper waste is takeout food containers. They are often made of paper products or packed in paper bags. Next time you and your family decide to eat out for a meal, request that you sit down in the restaurant instead of taking the food in to-go containers. Most fast food restaurants use paper products to individually wrap all food. Therefore, ask your family if you can cat at a conventional sit-down restaurant for your next night out.

Encourage others to save paper.

To have an even bigger impact, you can encourage others to save paper as well. One of the best ways to reach the most people is to put up signs that inform people how they can help.  They will help raise awareness of the importance of protecting trees. Make sure you print or draw your signs on reused paper (like the back of old homework). Trash containers and recycling bins are a great place for signs.

A. Choose to use paper plates and dishes.

B. Here are some ways to save paper.

C. It is a good way to reduce paper waste from packaging.

D. Many grocery stores provide paper bags to pack groceries.

E. Dine in instead of using takeout containers at restaurants.

F. Many of today's consumer items are wrapped several times.

G. There are lots of signs that you can print off from the Internet.

Using the health records of more than a million Swedish conscripts (应征入伍者), a recent study revealed that keeping cardiorespiratory (心肺的) fitness in their late teens and early twenties can cut the risk of developing nine types of cancer by 40% when older. The research team from the University of Gothenburg, Sweden said, "These results could be used to further strengthen the promotion of interventions aimed at increasing fitness in youth."

Almost a third of people aged from 16 to 24 in England aren't physically active, without meeting guidelines of at least 150 minutes of moderate physical activity a week including walking, riding a bike and dancing.

Cardiorespiratory fitness (CRF) measures how well the heart, lungs and linked systems work to get oxygen to muscles during constant activities. The conscripts, aged between 16 and 25, had tests of CRF on exercise bikes between 1968 and 2005. The researchers used Swedish health data to see who went on to have cancer during an average follow-up of 33 years. The study found that increasing fitness was beneficial, regardless of body weight. However, they also found that higher fitness was linked to a higher risk of skin cancer. The researchers explained that this trend might be driven by exposure to sunlight.

Findings from those observational studies provide much evidence for a link between higher levels of physical activity and a lower risk of cancer. However, these studies cannot fully rule out the possibility that active people have lower cancer risk because they engage in other lifestyle behaviors. The researchers cautioned that they had no access to full data on factors such as diet, alcohol intake and smoking and so couldn't fully account for those.

Dr Claire Knight, of Cancer Research UK, said, "The NHS recommends 150 minutes of activity a week, but it's fine to build up activity over time and there are lots of ways to be more active. You don't need to run a marathon or join a gym. Anything that gets you warmer and slightly out of breath and your heart beating faster counts."

If you've ever waded into the ocean for a swim and suddenly realized that the shore is getting farther away, not closer, you may have encountered a rip current (离岸流). Common at beaches worldwide, these powerful currents flow from the shore toward the sea at speeds up to several feet per second.

It's important to know what rip currents are and how to look for them, because they are a leading cause of drownings in the surf zone near shore. Rip currents can form in several ways. One type of rip current, known as a channel rip current, forms when there are gaps between breaking waves. As waves break, they push water toward the beach and raise the level of the water slightly. If waves break on a sandbar (沙洲), but not in a deeper channel that cuts through the sandbar, the extra water that the waves have pushed toward the beacon escapes back to the ocean through the channel. The darker corridor of the escaping water acts like a conveyor belt, moving water, unsuspecting swimmers and small marine organisms offshore.

Another type, known as a transient or flash rip current, forms when surf is choppy (波涛汹涌的). The edges of breaking waves push on the water and make it spin, like a fast ice skater crashing into someone.

Think of a rip current as a swift river cutting through the surf away from the shore. Swimming against the current is going to tire you out and put you at risk of drowning. Instead, swim parallel to the beach—think of heading for the "river banks"—until you are out of the rip current's pull. Once you're no longer fighting it, you can swim back to shore.

Rip currents aren't just a safety issue. Scientists are beginning to better understand the crucial ecological role they play in the ocean. Many marine organisms including oysters, barnacles, fish and coral, rely on ocean currents to find suitable habitats. These organisms swim up or down or attach to floating or sinking material and are transported by multiple ocean processes. Rip currents are a key mechanism for carrying larvae (幼体) to deeper waters or recalculating them in shallow waters. The type and behavior of the rip current may affect the movement of marine organisms.

After over a decade of faithful service my old desktop computer finally died. It simply wouldn't start. With no computer repair places open my daughter talked me into purchasing a new laptop to replace it. What followed was two days of pure frustration. It was like going from driving an old Model T Ford to flying the Space Shuttle.

After my daughter set it up, I looked for the old e-mail program I used to use, only to find that it wasn't on this model. When I tried to download the older version again it wouldn't work. I also had a terrible time downloading my old word processing program again. Then there were some difficulties of transferring all of my old stories that I had saved on a jump drive. The laptop computer's fancy new programs were an icon minefield that I had to navigate. Each time I accidentally touched one of them it changed everything on my screen and I had to work hard to figure out how to change them back. In the end I had screwed up the settings so badly that I asked my daughter to do a reset so we could start over. Finally after two days I think we have set up the new computer to do the few simple things I need it to do so I can ignore the thousand other functions that I have no use for. I only hope it will work as long and faithfully as my old desktop did.

One thing I did learn from all of this is that when it comes to computers and life I want to keep things simple, simple, simple. Life is simple. Love is simple. It is we who make things complicated. Take some time today then to turn off your electronics and turn on your heart. Be a person, not a program. Be yourself, not your "Selfie". Fill your days with purpose, your years with happiness, and your life with love.

The Best Smart Water Bottles of 2023 for Better Hydration (补水)

You can expect to pay between $20 and $120 for a smart water bottle. Less-expensive options may include some smart features, like Bluetooth connectivity, hydration reminders, or a power bank that can charge your smartphone. If you're looking for more advanced smart features, like self-cleaning modes, hydration tracking through an app, or location-tracking, then you may want to consider a more expensive smart water bottle.

Best Overall: Hidrate Spark STEEL Smart Water Bottle

Pros: Frequent hydration reminders Wide range of sizes and colors | Location-tracking feature

Cons: No self-cleaning feature

Best Budget: ICEWATER 3-in-1 Smart Water Bottle

Pros: Can be locked when not in use | Plays music | Easy to use with one hand

Cons: Can't track your water intake | Only comes in one size

Best Self-Cleaning: Larq Bottle PureVis

Pros: Long battery life | Modern design | Durable

Cons: Can't track your water intake

Best Durable: CrazyCap UV Water Purifier & Bottle

Pros: Two self-cleaning modes | Comes with a lifetime warranty (保修期) | Wide range of colors

Cons: Can't track your water intake | Only comes in one size

Best for Tracking Hydration: Gatorade Smart Gx Bottle

Pros: Large capacity Can be personalized | Set goals in the app

Cons: Not insulated (绝缘) | Might not be as durable

Best Lightweight: Monos Kiyo UVC Bottle

Pros: Durable | Long battery life | Modern design

Cons: Expensive

Best Rechargeable: Philips Water GoZero Self-Cleaning Smart Water Bottle

Pros: Self-cleaning | Dishwasher safe | Two-year warranty

Cons: Can't track your water intake

Research shows that laughing has significant (benefit). Last week, I was asked to go to  theater with my friend. It was just a comedy in  someone pretended to be someone else. The character was very thin and weak，  pretended to be very strong. One day， he was boasting that he could beat anyone in the world when a strong man， tall and fat， appeared in front of him. With  (embarrass) look on his face, the thin man fled away as soon as possible. The whole audience burst into laughter, relieved and relaxed.