查清

chá qīng shì qing de lái lóng qù mài

查清事情的来龙去脉

find out how something started and developed

wǒ xī wàng wǒ men kě yǐ chá qīng cǐ shì

我希望我们可以查清此事。

I hope we can find out about it.

wǒ bì xū chá qīng zào chéng zhè yī hùn luàn jú miàn de zhēn zhèng yuán yīn

我必须查清造成这一混乱局面的真正原因。

I have to get to the bottom of this mess.

jǐng fāng zhèng shè fǎ chá qīng dào dǐ fā shēng le shén me

警方正设法查清到底发生了什么。

The police are trying to ascertain what really happened.