zero hour

• n. 零时

英英释义

Noun:

1. the time set for the start of an action or operation

例句

用作名词 (n.)

1. 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。
2. 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。

近反义词

【近义词】

• conjuncture 结合