有些测试可能会导致较长的反馈，例如@font-face测试，它的特性不是即时可用的，所以这是一个异步检测。

Some tests involve a timed fallback, like the @font-face test, because their associated feature is not always immediately available, and needs an asynchronous check.

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据检测，对于涉及多个数据源的复杂查询，使用异步可以令其执行时间节省40%甚至更多。

Elapsed time reductions of 40% have been measured for complex queries with multiple sources, and potentially greater reductions are possible.

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该文研究了频率选择性瑞利衰落信道中的异步ds - CD MA系统盲多用户检测。

This paper investigates blind multiuser detection for asynchronous DS-CDMA in frequency selective Rayleigh fading channel.

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