天性

tā tiān xìng bù ài shuō huà

他天性不爱说话。

He is sparing of words by nature.

tiān xìng cōng huì

天性聪慧

be intelligent by nature

tā tiān xìng kāi lǎng

他天性开朗。

He has a happy nature.

xǐ xīn yàn jiù shì rén lèi de tiān xìng

喜新厌旧是人类的天性。

It's only human nature to love the new and loathe the old.

tiān xìng wēn liáng

天性温良

good-natured