这是一个自然风景极美的地方，所以河上可供租用的船只数量有限。

Because it is an area of outstanding natural beauty, the number of boats available for hire on the river is limited.

《柯林斯英汉双解大词典》

这是一个自然的情境。

It is a natural condition.

youdao

但这是一个自然常数，像重力常数一样。

It's a natural constant, like the constant of gravity.

youdao

It is something that happens pretty much automatically, with a kind of fluidity that Mike has never achieved.

这是一个相当自然就发生的事情，其中的流度迈克从来没有实现过。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选