coefficient of moment

例句：

1. 1.The moment of truth is upon us.
   关键时刻来临了。
2. 2.Time flies when you're having fun.
   玩得开心时，时间飞逝。
3. 3.The moment she saw the movie poster, she knew she had to see it.
   她一看到电影海报，就知道她一定要去看。