Though the ideal cure for noise is to stop it at its source, this may in many cases be impossible.

虽然消除噪音的理想方法是在其根源处阻止它，但在许多情况下这可能是不可能的。

youdao

The strength of RF fields is greatest at its source, and diminishes quickly with distance.

射频场的力量在射频源最强，并随距离而迅速减弱。

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Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap.

即使管道供水系统在水源处安全的，等水到达龙头时就不一定总是安全的了。

youdao

His magic is directed at the metadivine realm, trying to tap into its powers. It's not directed at the gods. It's trying to tap into the ultimate source of power to use that power to influence the gods in a particular way or protect oneself against the gods.

这种法术的对象是超神领域，试图获得其中的神力,它不直接针对神，而是通过接近,神力的源头来获得力量，用特殊的方式影响众神,或保护某人不受到神的伤害。

耶鲁公开课 - 旧约导论课程节选

In addition to strengthening the ATF's enforcement power, we need to attack gun trafficking at its source by limiting the high-volume gun sales that fuel trafficking from licensed dealers.

CNN: Commentary: Stop flow of U.S. guns to Mexico drug war

Government cannot specifically control the money supply at its source in a fractional reserve system, but only react to conditions caused by the decisions of individual banks to supply or not.

FORBES: Private Currency Competition Is The Monetary Answer

So the federal government has now invited the provinces to sign a deal to ban, for environmental reasons, the bulk withdrawal of water at its source an attempt at an export ban by other means.

ECONOMIST: Canada��s water