youdao

There is little doubt, however, that desertification in most areas results primarily from human activities rather than natural processes.

然而，几乎毫无疑问，大多数地区的沙漠化主要是由于人类活动而不是自然过程造成的。

youdao

They would have to concentrate on natural processes that continue at a constant rate and that also leave some sort of tangible record in the rocks.

他们必须专注于以恒定速度持续的自然过程，并且在岩石中留下某种有形的记录。

youdao

Direct impacts of climate change on natural processes may be exacerbated by human activities.

UNESCO: Social and Human Sciences

At that depth there also is -- there are natural processes that deal with some amount of oil.

WHITEHOUSE: Press Briefing

Carbon monoxide is exclusively artificial, and though some ozone is the result of natural processes, most of it is not.

ECONOMIST: Saturday-night showers