永久性的控制这里描述的输出构成了风险分析和风险管理之间的主要区别，并且对它的功效有必不可少的作用。
The permanent control of the outputs as described here constitutes the main difference between Risk Analysis and Risk Management and is essential to its efficiency.
如果他们被永久性撤离，也就不知道如何控制正在发生的危害。
If they must be permanently evacuated, it's unclear how the extent of the damage that's now occurred can be contained.
海岸警卫队希望两家公司能制定出一个计划，以便永久性控制残留在钻井平台废墟中的石油。
The Coast Guard also wants the companies to come up with a plan for permanent remediation of the oil that remains in the wreckage.
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