You might have heard or read this phrase somewhere before.

或许之前你已经在某些地方听到或读到过这句话。

Maria, have you heard this phrase before?

玛丽亚，你以前听过这句话吗？

I've never had to use that phrase before .

我以前从未使用过这个短语。

It's just, we--we've heard those phrases before when we interview school shooters.

只是... 我们之前访问校园枪手时 听过这些类似的话。