One day she came into his office and happened to put her hands on the door of a locked safe.

一天，维拉走进父亲的办公室，偶然把手放在一个锁着的保险柜的门上，

where chance discoveries play a much larger part than they do in physical and mechancal industries.

同物理和机械工业相比，化学工业中偶然发现的机会要多得多。

if there is any effect of noise upon mental health it must be so small that present methods of psychiatric diagnosis cannot find it.

如果噪音对精神健康有影响的话，那也一定是微乎其微，以致现代的精神病诊断方法还发现不了。

From the seventeenth-century empire of Sweden,

从17世纪瑞典帝国

and that this happens at a rate which differs little from person to person,

衰老的速度在人与人之间相差甚微，

Some hotels supply boiled water on request and this can be used for drinking, or for brushing teeth.

有的酒店根据要求可提供开水，这些开水可用于饮用和刷牙。