before the flood

• adv. 大洪水之前(远古以前；很古)

before the flood的用法和样例：

例句

1. Their departure just before the floods was providential.
   他们恰在发洪水之前离开，走得真是时候。
2. The old suit he is wearing at the moment looks as if it were made before the Flood.
   他身穿的这套旧衣服真不知道是哪个朝代做的了。