VOA慢速英语:Does Physical Activity Lead to Higher Grades?

base on使建立在…基础上,立足
例句：Action should be based on solid facts.
行动应有确凿的事实为依据。

2. Also, students involved in organized sports learn rules and how to follow them.

involve in使参与〔陷入, 牵扯到〕
例句：The vast masses there have become involved in the health campaign.
那里的广大群众都参加了卫生运动。

3. This could improve their classroom behavior and help them keep their mind on their work.

keep one's mind on专心于
例句：The teacher told me to stop talking in class and keep my mind on my work.
老师叫我上课时不要讲话，要认真做自己的功课。

4. They called for more high-quality studies to confirm their findings.

call for需要; 要求
例句：The letter calls for an investigation of the facts.
来信要求对这些事实进行调查。

5. They also pointed out that "outcomes for other parts of the world may be quite different.

point out指出
例句：He pointed out that there was little chance of success.
他指出很少有成功的机会。