| 21. | You'll develop deep frown if you don't wear your glasses for reading. |
| 如果你看书时不戴眼睛，你就会逐渐养成紧皱眉头的习惯。
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| 22. | Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop . |
| 反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，而且要有极好的条件才能使生命得以发展，
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| 23. | The life forms most likely to develop on a planet would be bacteria. |
| 行星上最容易生存下来的是细菌。
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| 24. | Although perhaps only 1 per cent of the life that has started somewhere will develop into highly complex and intelligent patterns, so vast is the number of planets, that intelligent life is bound to be a natural part of the universe. |
| 虽然在已经产生生命的某个地方，可能只有1%会发展成高度复杂有智力的生命形态，但是行星的数目是那么庞大，有智力的生命必然是宇宙的自然组成道听部分。
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| 25. | When one seriously studies the social orders that have had the opportunity to develop autonomously, the figure becomes no more than an exact and matter-of-fact observation. |
| 当一个人认真地研究自发形成的社会秩序时，杜威的比喻就是他实事求是观察得来的形象化的说法。
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| 26. | Later, for its personal safety and practical needs, it has to develop ( partly by means of touch) the ability to judge roughly three-dimensonal distances. |
| 慢慢地，由于自身安全和实际需要，儿童必须发展（部分通过触觉）粗略判断三维空间距离的能力。
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| 27. | Clearly, in this region, the partnership of man and geography did not develop as fully as elsewhere. |
| 显然，这个地区的人和地理的合作不象其它地区那样充分。
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| 28. | Moreover, children will have less time to play and communicate with their peers due to extra studies, consequently, it is difficult to develop and cultivate their character and interpersonal skills. They may become more solitary and even suffer from certain mental illness. |
| 而且，由于要额外地学习，孩子们没有多少时间和同龄的孩子玩耍和交流，很难培养他们的个性和交际能力。他们可能变得孤僻甚至产生某些心理疾病。
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| 29. | Although perhaps only 1 per cent of the life that has started somewhere will develop into highly complex and intelligent patterns, so vast is the number of planets that intelligent life is bound to be a natural part of the universe. |
| 虽然在某处已经开始的生命中可能仅有百分之一会发展成高度复杂、有智慧的型式, 但是行星的数目如此之多, 以致有智慧的生命一定是宇宙的一个天然组成部分。
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| 30. | At the same time, young people should be encouraged to communicate with their peers and develop their interpersonal skills, which may help them greatly to reduce dependence on their parents and are essential in the maintenance of healthy mental condition. |
| 同时，应该鼓励年轻人和他们的同龄人交往，发展他们的交际能力，这将帮助他们极大地减少对父母的倚赖并且保持健康的精神状态。
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