Obviously, to choose shifting time accurately is a key to realize single machine test.
显而易见，正确地选择切换时机是实现单机测试的关键。
Theboundaries between acceptable and unacceptable language are shifting all the time.
可接受的语言和不可接受的语言之间的界限一直在变。
Theboundaries between acceptable and unacceptable language are shifting all the time.
可接受的语言和不可接受的语言之间的界限一直在变。
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