疑团

yí tuán nán yǐ jiě kāi

疑团难以解开。

It's difficult to clear up the doubts.

qǐ yí tuán

起疑团

raise a doubt

xiāo chú yí tuán

消除疑团

remove all doubts

wǒ xīn li yǒu yī gè yí tuán

我心里有一个疑团。

I have in mind some doubts which really puzzle me.

tā de shī zōng yǐn fā le hěn duō yí tuán

她的失踪引发了很多疑团。

Mystery surrounds her disappearance.

gōng kāi yí tuán

公开疑团

make the suspicions public