人为

shì zài rén wéi

事在人为

everything depends on human effort

rén wéi chéng shì

人为成事

It takes human effort to do things.

zhè xiē shì rén wéi yuán yīn

这些是人为原因。

These are factors created by men.

shù mù zāo dào rén wéi pò huài

树木遭到人为破坏。

Thess harms on the tree were done by purely man-made factor.

wǒ men bù néng bèi rén wéi kùn nan dǎ dǎo

我们不能被人为困难打倒。

We can't be knocked down by artificial difficulties.