All of this is a natural cycle that everyone must go through.

但所有这些不过是每个人都要经历的自然周期罢了。

youdao

This will help combat insomnia by giving in to your body's natural cycle.

适应你身体自然循环后，这将有助于抗击失眠。

youdao

Skeptics say global warming is part of a natural cycle of climate change.

但是持怀疑态度的人士认为，全球气温上升是气候变化自然循环的一部分。

youdao

Skeptics argue,however, that rising temperatures and warmer oceans are part of a natural cycle and are not convinced the changes are a result of man's pollution.

VOA: standard.2009.05.03

Skeptics say global warming is part of a natural cycle of climate change.

VOA: standard.2009.12.09

So some of that happens because -- just as a natural cycle of this.

WHITEHOUSE: Press Briefing

To a certain degree, the hand wringing is part of a natural cycle.

FORBES: Are Reports of the Death of American Tennis Premature?

Melatonin is a hormone produced in a gland in the brain, and helps maintain the natural cycle of sleep and wake.

BBC: NEWS | Health | Sleep supplement asthma warning