然而，谁有能力把预防问题放在第一位，能找出某种措施杜绝问题发生是一项有挑战性的工作。
However, determining who has a talent for preventing problems in the first place, and figuring out how to incentivize such behavior, is a significant challenge.
我们必须尽我们的一切所能杜绝核恐怖问题的发生。
We must do whatever we can to prevent realization of nuclear terrorism.
完全堵住调用者，如在线程池的“明显的”实现的情况，可以杜绝我们试图解决的问题的发生。
Pushing the blocking all the way to the caller, as is the case in the "obvious" implementation of a thread pool, can end up causing the same problem we were trying to solve.
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