zero hour
英英释义
Noun- the time set for the start of an action or operation
例句
用作名词(n.)- For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时，分子的碰撞就停止了。
- It is the distance between atoms corresponding to zero potential energy.这就是相应于势能为零时的原子间距。
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