有些人总是不鸣则已一鸣惊人。

The quiet ones always sneak up on you.

一个是不飞则已，一飞冲天；不鸣则已，一鸣惊人。

The other is Does not have been a fly, has been soaring; do not have alarms, the blockbuster.

第3点，就是我军正在研制新一代战略或者战术武器，这叫做不鸣则已，一鸣惊人。

Point 3, that is, our military is developing a new generation of strategic or tactical weapons, this is called craze has become an overnight success.