has not / does not /fails to /was not 中文如何区别? 1.the valve has not confirmed open. 阀门尚未确认开-----强调这个确认是应该随后确认的,现在还没有进行 2.the valve does not confirm open. 阀门未确认开-----强调目前状态 3. the valve fails to confirm open. 阀门无法确认开-------强调阀门开关信号无法反馈 4.the valve was not confirmed open. 阀门没有确认开----这个确认应该完成而没有完成 5.the valve is confirmed open. 阀门已确认开-----强调确认已经完成查看更多