1. Every solid object will reflect a sound, varying according to the size and nature of the object.
    任何固体者反射声音，反射的声音因物体的大小和性质的不同而不同。

2. Even if human cloning offers no obvious benefits to mankind, why ban it?
    即使克隆人类不会给人类提供任何明显的好处，可为什么要禁止它？

3. But, of the vertebrates, unpredictable Nature selected only snakes (and one lizard).
    但是在脊椎动物中, 神秘莫测的大自然只选择了蛇(和一种蜥蜴).

4. But, of the vertebrates, unpredictable Nature selected only snakes (and one lizard).
    但是在脊椎动物中, 神秘莫测的大自然只选中蛇(和一种蜥蜴)

5. But in an old man who has known human joys and sorrows, and has achieved whatever work it was in him to do,
    可是老年人已经饱尝了人间的甘苦，一切能做的都做了，

6. Because they destroy so many insects, and insects include some of the greatest enemies of the human race.
    因为它们能消灭那么多的昆虫，其中包括一些人类的大敌。

7. But, of the vertebrates, unpredictable Nature selected only snakes (and one lizard).
    然而，在脊椎动物中，大自然神秘模测地只选择了蛇（还有一种蜥蜴），

8. Beauty in terms of our human meanings is meaningless.
    用对我们人类有意义的词解释美是没有意义的。

9. Broadly speaking, human beings may be divided into three classes:
    泛泛地说，人可以分为3类：

10. Beggars almost sell themselves as human beings to arouse the pity of passers-by.
    乞丐出售的几乎是他本人，以引起过路人的怜悯。