A signal failure contributed to the crash.
信号灯故障导致了这次撞车事故。
TCP could signal a failure and give up when both end-points are fine.
超出个时间，TCP会发出一个故障信号，然后放弃重传。
Instead, they offer JUnit assertions to both signal the failure and unwind the test.
相反，他们提供了JUnit断言来通知失效或者展开测试。
An early investigation blamed the signal system failure on a loss of power.
初期调查是归咎于停电造成信号灯故障。
An early investigation blamed the signal system failure on a loss of power.
初期调查是归咎于停电造成信号灯故障。
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