at source

基本解释

They aim to stop an event at source, before it has a chance to become an international threat.
《条例》的目的是在有机会成为国际威胁之前，从根源制止事件的发生。
This strategy aims to detect an event early and stop it at source, before it has an opportunity to become an international threat.
这一战略旨在及早发现事件并在它有机会成为国际威胁之前，在源头加以遏制。
If spraying at source really is as good or better than surface spraying, and requires a great deal less dispersant, it will be a boon.
如果在海底漏油源头喷洒分散剂的效果与在海面喷洒的效果相同，或是更好，而且可以减少分散剂的使用量，那这对人们来说将会是一个喜讯。

A source of anger for many lawmakers at the hearing was a U.S.government contract for a so-called "virtual fence" monitoring system along the nearly 3200-kilometer U.S.-Mexico border.
But thankfully now in 2010, we're at the point where there's a whole lot of free and open source software that you can integrate into your projects that other nice people have made available.
不过幸好在2010年,现在有很多可用的开源,代码软件，你可以将其融合,到你的工程中。
哈佛公开课 - 计算机科学课程节选
And source critics looking at this material discern numerous, diverse sources that are interwoven throughout.
一些材料批评学家认为这个故事，是由很多素材交织在一起的而成的。
耶鲁公开课 - 旧约导论课程节选

However, this form of energy requires expensive plants to turn the gas into liquid at source.
ECONOMIST: Drilling on Wall Street