They have been shown to support proper brain function.

它们已被证明可以支持正常的大脑功能。

The proper function of man is to live, but not to exist.

人应该生活，而不是单纯生存。

A job where you had a proper function. A house where things broke at regular intervals, so you always had something to tinker with.

一份可以有所作为的工作，一套房子，里面的东西定期有个故障，好让他们修修补补。

Then what is a disease? It may be defined as a condition that impairs the proper function of the body or of one of its parts.

每一种生物、植物和动物，都可能会死于疾病。例如，人类常常被微小的细菌所感染，但是，反过来说，细菌能够被更加微小的病毒所感染。