1. The operation began at zero hour.
行动在零时刻开始。

2. Students felt nervous as zero hour approached.
随着关键时刻临近，学生们感到紧张。

3. The team was ready before zero hour.
团队在关键时刻前已做好准备。

4. Everything must be in place by zero hour.
所有事情必须在关键时刻前准备就绪。

A: Are we ready for zero hour?
A：我们准备好迎接关键时刻了吗？

B: Yes, everything is set before zero hour.
B：是的，所有事情都在关键时刻前准备好了。

1) 关键行动开始的时间点

2) 军事或任务执行的启动时刻

3) 比喻人生或考试的重要时刻

4) 计划正式执行的时间

1. 关键时刻；零时

e.g. The mission started at zero hour.
任务在零时开始。

2. 决定性时刻

e.g. Everyone was ready for zero hour.
每个人都为关键时刻做好准备。

noun

1. The exact time at which a planned operation or important event begins.

Synonym: starting point, critical moment