如果有一方或双反都感觉很差，变动就可能产生了。
可以包含包封、反包封或加密。
公制或英制读反可用。
过于严重的反压力、冰冻或水锤扭曲了第二止回阀。
Excessive back pressure, freezing, or water hammer has distorted the second check.
最常见的原因是主动脉瓣或肺动脉瓣反流。
The most common causes are aortic or pulmonic valve regurgitation.
反酒馆同盟领导人的目标，开始是地方专卖或全州范围禁酒。
The goal of Anti-Saloon leader was at first local option or state-wide prohibition .
偶尔，逃离反乌托邦可能可以用时光旅行或改变历史达成。
Occasionally, the escape from dystopia is made possible by time travel and changing history.
反措施，对抗手段，对策对抗或抵消某手段或行为的策略或行动。
反措施，对抗手段，对策对抗或抵消某手段或行为的策略或行动。
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