on the off chance

• adv. 可能性小(万一某事发生的话)

on the off chance的用法和样例：

例句

1. Stopped by on the off chance that they're home.
   停下车看看，既使他们在家的可能性很小
2. I didn't think you'd be at home, but I just called on the off chance.
   我想你不会在家的，只是抱著一线希望给你打个电话。