1. Here we have a little child, without knowledge or experience; there a grown-up person with fully developed mental powers.
    一边是一个既无知识又无经验的儿童；另一边是一个思维功能已经完全的成人。

2. "What happens is that the hotter people get, physiologically, with mental stress, the more likely they are to blow apart with some heart problem."
    "此时就会发生这种情况--人们由于心理上的压力在生理上变得越发激动，他们的身体就越可能因为某种心脏病而垮下来。"

3. A succession of scientific studies of animals implies that physical activity has a positive effect on mental functioning.
    对动物的一系列科学研究表明，体育活动对智力的发挥有积极作用。

4. Another advance, a computer-controlled brain scanning device, has led to a second discovery by those seeking the biological component of mental abilities.
    另一进展，一台计算机控制的脑部扫描仪，使得寻找思维能力的生理因素的研究人员有了第二个发现。

5. Such an attempt only aggravates the strain of mental effort.
    这样的尝试只会加重精神劳累。

6. Such an attempt only aggravates the strain of mental effort.
    这样的尝试只会加重精神劳累。

7. Such an attempt only aggravates the strain of mental effort.
    已没有用了。这种愿望只能加剧精神紧张。

8. Some scientists speculate the reduction in mental function often attributed to getting old may really be a penalty of neglecting to stay physically active, in addition to related factors such as medicines and poor diet.
    一些科学家推测，除了药物作用和饮食不当等相关因素外，常常归咎于衰老的大脑功能下降实际可能是对不注意保持体育运动的一种惩罚。

9. But it does mean that noise is less dangerous than, say, being brought up in an orphanage----which really is a mental health hazard.
    但它确实说明，噪音的危险性 -- 比如说 -- 比在孤儿院长大所受的危害要小一些，孤儿院才是真正危害精神健康的地方。

10. Consequently, the brains of people who exercise may be better equipped to tackle mental challenges.
    因此，那些进行锻炼的人的大脑可能更有能力应付各种智力挑战。