Either the natural circle material flow or the social circle material flow and the economic circle material flow are all having the four attributes (RPMF).

无论自然界物流，还是社会界物流，经济界物流，都具有这四个方面属性(RPMF)。

youdao

Welcome or not, dying is a natural part of the circle of life.

不管你是不是喜欢，愿不愿意接受，死亡都是生命循环中最自然最必不可少的一部分。

youdao

I think it's part of the whole circle of natural and organic and real and authenticity is the big trend.

我认为这是自然的、有机的、真实的整个大循环界的一部分，真实性是一个大趋势。

youdao

But we do have to teach our children how to widen the moral circle, and to extend their natural compassion and care even to the Flurps.

WSJ: Moral Puzzles That Tots Struggle With | Mind & Matter

The U.S. Geological Survey estimated in 2008 that some 22% of the world's undiscovered oil and natural-gas deposits are located above the Arctic Circle.

WSJ: Arctic Body Weighs China's Bid to Observe

The North Cape is known as one of the few places in Norway where you can experience the midnight sun, a natural phenomena of 24 hours of sunlight occurring only in summer in certain spots above the Arctic Circle.

FORBES: An Arctic River Cruise Should Be Your Next Adventure