The laws of nature are absolute.

　　自然規(guī)律是絕對確鑿的'。

　　Just let nature take its course.

　　就順其自然吧。

　　Dishonesty is foreign to his nature.

　　弄虛作假并非他的本性。

　　There was a darker side to his nature.

　　他本性中還有陰險(xiǎn)的一面。

　　By its very nature a lion is ferocious.

　　獅子本性兇殘。