by nature

It’s unlikely that this gully was produced by nature.

这个溪谷不大可能是自然出现。

I'm not violent by nature .

来并不粗暴。

I'm very lazy by nature.

很懒惰。

He is timid by nature.

他胆小。

Tigers are cruel by nature.

老虎残忍。

And all this beheath a sky by nature skyless in which the sun sets without setting at all and hides without hiding behind an unminding cloud.

而这切都是在个本身没有天空天空下，太阳在那里点也不沉落地沉落点也不隐藏地隐藏在朵非自愿云团背后。