•The ownership of the painting remains unclear.这幅画的归属目前还不清楚。

•[+ question word] It's unclear wh at actually happened that night.那天晚上到底发生了甚么尚不清楚。

•It's unclear wh ether he arrived before or after the shot was fired.不清楚他是在开枪之前还是之后到的。

•I'm unclear about a couple of points in your proposal - could you go over them again?我对你的提议有几点没弄清楚——你能不能再讲一遍？

•I'm unclear (as to) wh ether we're meant to stay here or not.我不清楚是否是要我们留在这儿。