With minor ailments the best thing is often to let nature take its course.

对于小病，往往最好是听其自然。

《牛津词典》

Of course, in the nature of things, and with a lot of drinking going on, people failed to notice.

当然了，事出必然，酒酣之间人们没有注意到。

《柯林斯英汉双解大词典》

In the course of trying to do so, they generated a lot of ideas about the nature of the problems and about what potential solutions would look like.

在尝试这样做的过程中，他们产生了很多的想法，关于问题的本质和潜在解决方案会是怎样的。

youdao

And every fair from fair sometimes declines, By chance or nature's changing course untrimmed;

VOA: special.2010.01.06

Milton acknowledges that the course he's chosen for himself may not be a natural one: Nature herself pushes a young man to begin a family and to seek credible employment .

弥尔顿知道他选择了一条,不那么正常的人生道路：,天性使得一个年轻人去结婚,去找一份可靠的工作。

耶鲁公开课 - 弥尔顿课程节选

She explains that nature, of course, wants us to / "live according to her sober laws / and holy dictate of spare Temperance."

她解释说，自然当然希望我们,“根绝她审慎的法律/,和神圣的有关节制的规定来生活“

耶鲁公开课 - 弥尔顿课程节选

Some critics feel that this operation is no better than letting nature take its course.

ECONOMIST: Trial and error

Shortly after it, the training command elected to let nature reclaim the course.

WSJ: The Afterlife of Fort Bragg's Golf Course | Golf Journal by John Paul Newport

"I won't be cutting it down, I'll leave the tree as it is and let mother nature take her course".

BBC: Man down! Rihanna tree is dying according to farmer