允许某种程度的行动自由是一种不错的方法，可用于测试现有流程或确认现有流程是为另一种类型或规模的活动而设计的。
Allowing some latitude is a good way to test the existing processes, or to acknowledge that existing processes are designed for another kind or size of activity.
虽然大多数模拟器是为认证测试准备工作而设计的，但是相对于购买实际硬件，模拟器能够以很低的成本构建虚拟服务器环境，从而提供极大的好处。
While most are designed for preparing for certification testing, they can offer a great benefit for building a virtual server environment at a reduced cost relative to buying the real hardware.
这是1960年 高空跳落测试人员人员约瑟夫·凯庭尔的某次超级跳跃，他是美国空军为测试飞行员如何能够由高空跳伞幸存而设计的一项紧急援助项目中的“一部分”。
One giant leap from the stratosphere. The 1960 high-dive of Joseph Kittinger, part of a U.S. Air Force program designed to test whether pilots could survive high-altitude bailouts.
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