What lies at the root of his troubles is a sense of insecurity.

他的一切忧虑源于一种不安全感。

《牛津词典》

Emitting too much greenhouse gases such as carbon dioxide lies at the root of global warming.

排放过多温室气体，如二氧化碳，是全球变暖的根本原因。

youdao

Jet nozzle is arranged at the root of the fairwater.

喷流孔布置在导流帽的根部。

youdao

At the root of the sharp price decrease is reduced demand because of the economic downturn.

VOA: special.2009.01.03

But if you can accept the purity of the statement I just made, it is at the root of the thing you have a solution.

但如果你能够遵从原教旨主义的方式,那么这就是你解决此问题的根本

耶鲁公开课 - 古希腊历史简介课程节选

That's Western civilization, friends, and the Greeks are at the root of the whole thing.

这就是西方的文明,朋友们,而希腊人恰恰是这一切的源头所在

耶鲁公开课 - 古希腊历史简介课程节选

Bad regulations are always at the root of black markets and the criminality they spawn.

FORBES: Migranomics Instead of Walls

The point being that money and stature was at the root of all those realignment decisions.

FORBES: Tradition Fades When Media Revenue Pays in Conference Realignment Game

This vicious cycle of patronage and corruption lies at the root of Turkey's financial ills.

ECONOMIST: Fresh IMF money may save the economy, at a high social cost