to tremble in the balance

• 到达紧要关头； 处于极度危险中

to tremble in the balance的用法和样例：

例句

1. When it comes to the crunch they will support us.
   到紧要关头他们会支持我们的。
2. His fate is trembling in the balance.
   他的命运正处在紧要关头。