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The biggest benefits seem to come to those who master their second languages fully. Switching languages frequently in the course of a day may be particularly important. A bit of university French does not, unfortunately, convey the same advantages as deep knowledge and long experience. Studies of interpreters and translators have provided some of the strongest evidence for a bilingual advantage. For example, they are faster at jumping back and forth between simple addition and subtraction problems than monolinguals, suggesting generally better cognitive (认知) control.

Studies have found striking evidence that in poorer parts of the world multilingual people show the strongest advantages from speaking several languages. Where schooling is limited, researchers assumed that bilingualism exercises children's brains in a way that their schooling may not.

Age plays a role, too. Studies suggest that the effects of languages on the brain are stronger for young children and the old than they are for young adults. One meta-analysis on the topic revealed that 25 studies out of 45 found a bilingual advantage in children younger than six, while only 17 found them in children aged 6-12.

But all these studies take for granted the mental superpower that you get from language study: being able to talk to people you could not have spoken to, or understood, otherwise. Even if you cannot be fluent from infancy (幼儿), that should be more than enough reason to give it a go.

Found only in eastern and southeastern Australia, platypuses are some of the most unusual mammals on earth. They have webbed feet and a duck-like bill, lay eggs, and live in rivers, lakes, and streams. Experts worry that the animals are in danger of becoming extinct because their habitat is declining. But platypuses are difficult to study because they prefer to be active at night and spend most of their time in burrows (地洞) or in the water.

The Healesville Sanctuary, a zoo that specializes in animals native to Australia, has trained dogs to use their keen sense of smell to locate hard-to-find species. The Dog Squad, as the dogs are called, have helped experts find critically endangered creatures. The Dog Squad has been carefully trained not to disturb the animals. Once a dog detects its target, it simply sits and points its nose in the right direction.

Now researchers have trained two dogs, a Labrador retriever named Moss and a Kelpie mix named Pip, to find out platypuses. Since platypuses spend so much time in water, the dogs have learned to ride a paddleboard.

Wearing safety vests, the dogs excel at their job. Handlers say the biggest challenge was keeping the dogs calm and balanced on the water. The dogs now silently inform the team when platypuses are nearby, taking care not to scare the creatures away. They have even discovered the entrances to platypus burrows that humans were previously unable to access.

Scientists say this new way of tracking platypuses with the use of paddleboards has been a "game changer" for research. By figuring out where and how the platypuses live, experts can better understand how to protect these rare egg-laying mammals. "Platypus is such a unique species," said La Toya Jamieson, one of the wildlife detection dog officers. "It's so critical that we protect not only them but also their environment."

This is an excellent program for incoming college freshmen with a real passion for conservation.

How It Works

This scholarship program helps you tailor your college studies to become a leader in the conservation field. Incoming freshmen at George Mason University who qualify will receive an invitation. Begin your degree program at Mason on campus, with courses that will prepare you for studying conservation biology.

Who's Qualified?

Candidates for our SMSC are selected from incoming applicants to Mason and are evaluated on the following criteria:

●academic achievement in high school

●college application essays

●letters of recommendation

●participation in extracurricular activities

●standardized test scores

●Rising college freshmen in any major, by invitation only.

What You'll Learn

SMSC offers three full-time residential programs in conservation biology that integrate directly into your degree plan at Mason, no matter your major. You choose when to attend, either fall or spring of your junior or senior year. Through this one-of-a-kind opportunity, you'll get hands-on field experience working with rare and endangered species. You'll become a member of Smithsonian's world-famous community of conservationists where scientists, educators, and animal keepers will serve as your mentors (导师).

Choose one of three semester programs to suit your interests and academic schedule:

●Conservation, Biodiversity and Society

Offered in fall or spring to students with at least 45 undergraduate credits

Includes weekly work with a conservation expert

●Wildlife Ecology and Conservation

Offered in fall only to students with at least 60 undergraduate credits and an upper-level ecology course

Includes a five-week independent research experience under the guidance of conservation mentor

●Endangered Species Conservation

Offered in spring only to students with at least 60 undergraduate credits and an upperlevel ecology course

Includes a five-week independent research experience under the guidance of conservation mentors

●Additional Benefits

Private tours of our endangered species research facility

Priority registration for our popular, week-long summer field course

Access to seminars (研讨会) with world-famous researchers and scientists

（1）你对该节目的看法；

（2）你的具体建议。

注意：

（1）写作词数应为80词左右；

（2）可适当增加细节，使行文连贯。

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我知道作为一名高中生，我必须要更加努力的学习，并且要习惯于承担更多的责任。

她上周花了整整一天时间在网上申请签证，现在就等结果了。

当老师从他桌旁走过时，他假装在记笔记，还时不时点头，仿佛认同老师说的内容一样。

很多学生认为报名参加学校的英语演讲比赛是有意义的，因为他们想提升自己的英语口语。

自从上个月完成暑假作业后，莉萨就一直在当地的动物收容所做志愿者。

我听说兵马俑是一处令人惊叹的景观，我已经迫不及待想去看看了。

正是郎平的不懈努力，为她的国家带来了荣誉与荣耀。

旁边的人全程都在跟我说话，我根本无法专心做这个实验。

"体育界活传奇"指的是那些在自身运动领域堪称大师，同时也为他人树立了良好榜样的运动员。

与传统书籍相比，电子书在我们旅行时更方便携带。