by nature

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

这个溪谷不大可能出现的。

2.I'm not violent by nature .

我生来并不粗暴。

3.He is timid by nature.

他生性胆小。

4.Tigers are cruel by nature.

老虎生性残忍。

5.I'm very lazy by nature.

我生性很懒惰。

6.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.

而这切都在个本身没有天空的天空下发生的，太阳在那里点也不点也不隐藏隐藏在朵非愿的云团背后。