Until I find out what happened to my mother,在我查清关于我母亲的事之前

find out 发现；找出来；揭发

We shall find out the truth early or late.

我们迟早会查明事实真相。

Go and find out the truth to report back quickly.

立刻查明事实真相回来汇报。

Well, at least you can cross the Graysons off your to-screw list.至少你可以把格雷森一家排除在你的复仇名单之外了

at least至少

He has been there at least twice.

他至少去过那儿两次。

He should at least have come to say good-by.

他至少也该来道个别(然而却没来)。

cross off划掉； 勾销

Please cross off the wrong word in the sentence.

请将句中的错字划掉。

If you don't want to come, cross your name off.

如果你不想来，把你的名字划掉。