1. A number of domestic animals have some utility for man while they are alive.
    一些家畜在活着的时候对人类有一定的用途。

2. At the same time, a number of teenagers climbed on to the dish and held a little party of their own.
    就在这个时候，许多十几岁的孩子爬盘子举行他们自己的集会。

3. A: Yes, it was historic not only because it involved an enormous number of workers, but because it was led by the newlyfounded Communist Party.
    A：是的，那是一场有历史意义的大罢工，不仅仅是因为有大量工人的参与，而且还因为那场罢工是由新成立的共产党领导的。

4. As the Mormon church grew, many of the men followed Smith's teaching and married a number of wives.
    随着摩门教的发展，许多男人遵循史密斯的教导，娶了几房妻子。

5. As a result, the average number of births has been cut from 5.6 children per woman to 3.
    其结果是每个妇女从平均生育5.6个孩子下降到平均生育3个。

6. As the number of AIDS cases around the world rapidly increases, nations are showing great focus in battling this common enemy — attacking rich and poor countries the same.
    随着全球艾滋病患者数量的迅速增加，各国都极为关注同这一共同敌人的斗争--因为它同样袭扰着富国和穷国。

7. As the number of women going to school increases, the growth rate declines.
    随着受教育的妇女数量的增多，人口增长率正在下降。

8. "The animals that learned to go through the obstacle course exhibited a greater number of brain connections than the animals in the exercised or inactive groups," Greenough said.
    "与跑动的和不运动的老鼠相比，经过越障训练的老鼠脑神经联结数更多。" 格里诺说，

9. As the number of people on Earth increases, it becomes increasingly difficult for the population to survive on the resources of the land.
    随着地球上人口的增加，人类依靠土地资源生存变得越来越困难。

10. At 125th Street, Mr. Torres would transfer to the Number 4 train by crossing the platform.
    到了第125街，多里斯先生就要穿过月台去转4号列车。