clear up doubt

消除疑问,解除疑虑

如：

His testimony would help to clear up any doubt as to the cause of the death of the deceased.

他的证明有助于澄清有关死者死因方面的所有疑团。

They meet last night to clear up any linger doubt

他们昨晚会面,消除一切滞留的疑点

希望有帮到楼主O(∩_∩)O