During these tests she was able to read a newspaper through an opaque screen and,

在这些测试中，她能隔着不透明的屏幕读报纸。

When, for example, a customer first opens an account,

比如，储户首次在银行开户时，

What is needed in the case of noise is a study of large numbers of people living under noisy conditions,

对于噪音问题，需要对大量生活在噪音中的人进行研究，

The real dividing line between continents and oceans occurs at the foot of a steeper slope.

大陆和海洋的真正分界线是在陡坡脚大陆架慢坡

and often are foolish enough to let the adolescents see that they are annoyed.

而且愚蠢地让孩子看出自己的烦恼。

for it is then almost ready to undertake heavy work and can begin to earn its keep straight away.

这个年龄的象差不多已能干重活，可以很快挣回饲养它的开支。