1. The nomads who made these markings lived by hunting and fishing during the last Ice Age.
    作出这些刻记的游牧人，依靠狩猎和捕鱼生活在冰河时代的晚期.

2. The nomads who made these markings lived by hunting and fishing during the last Ice Age .
    作出这些刻记的游牧人，依靠狩猎和捕鱼生活在冰河时代的晚期.

3. There is often a progressive loss of sight in old age.
    人到老年视力往往逐渐衰退。

4. The man who, in old age, can see his life in this way, will not suffer from the fear of death, since the things he cares for will continue.
    上了年纪的人这样看待生命，就不会有惧怕死亡的心情了，因为自己关心的一切事件都会继续下去。

5. This is a sceptical age,
    这是一个怀疑一切的时代，

6. The most economical age to capture an elephant for training is between fifteen and twenty years,
    捕捉15至20岁之间年龄的大象进行驯象最为经济。

7. The nomads who made these markings lived by hunting and fishing during the last Ice Age which began about 35,000 B.C. and ended about 10,000 B.C.
    这些痕迹是游牧人留下的，他们生活在从公元前约35，000年到公元前10，000年的冰川期的末期，以狩猎、捕鱼为生。

8. The Hubble will tell us a great deal about the age and size of the universe.
    哈勃将告诉我们有关宇宙的年龄和大小的许多事情。

9. The Mormons believe that it is a woman's duty to marry at a young age and raise as many children as possible.
    摩门教的教徒认为：女人的职责就是在年青的时候结婚，尽量多养育孩子。

10. The Hopi allowed boys to leave their parents' home at age thirteen to live in a kiva, a special home for young males.
    霍皮族人允许男孩在13岁时离开父母的家，住到一幢叫做会堂的、专住年青小伙子的房子里去。