疫苗的安全性和有效性是其研发中最重要的标准。

There is no doubt that in exchanging a self-centered for a selfless life we gain enormously in self-esteem. The vanity of the selfless, even those who practice utmost humility, is boundless.

野外的规则是适者生存。

"To live is the rarest thing in the world. Most people exist, that is all."

定义属于下定义的人，而不属于被定义的人。

The genetic code is the set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins (amino acid sequences) by living cells.

从存在的迷宫中逃脱是不可能的。