Knowledge is incomplete, and natural systems are not necessarily stable.

因为相关知识还不完备，很多自然系统也不是必然地处于稳定状态。

youdao

Are there important natural systems which simply cannot be reduced and modeled accurately?

有没有完全不能精简并精确模拟的重要的自然系统？

youdao

The fundamental problem is that we have taken too much water out of natural systems of flow.

根本的问题就是，我们让太多的水离开了水流的自然体系。

youdao

It is a demonstration of how far human engineering ingenuity has reached, to be mimicking natural systems.

BBC: Robotic insect: World's smallest flying robot takes off

History is littered with plans that went awry because too little was known about complex natural systems.

ECONOMIST: Global warming

It continues to evolve around the edges, as scientists sharpen models and draw new links between interconnected natural systems.

FORBES: Climate Politics Stand Between Students and Science Education