底细

liǎo jiě dǐ xì

了解底细

know the ins and outs

yào xiān mō qīng tā de dǐ xì

要先摸清她的底细。

First you need to understand exactly where she's coming from.

wǒ men bù liǎo jiě nà jiàn shì de dǐ xì

我们不了解那件事的底细。

We don't know the ins and outs of that matter.

mō qīng chu dǐ xì

摸清楚底细

find out the ins and outs

nòng qīng mǒu jiàn shì de dǐ xì

弄清某件事的底细

get to the bottom of something

bù liǎo jiě nà jiàn shì de dǐ xì

不了解那件事的底细

do not know the ins and outs of that matter

méi yǒu rén zhī dào zhè ge qíng kuàng de dǐ xì

没有人知道这个情况的底细。

No one knows all the ins and outs of this situation.

tā xiū xiǎng piàn wǒ wǒ yǐ jīng bǎ tā de dǐ xì mō de yī qīng èr chǔ

他休想骗我，我已经把他的底细摸得一清二楚。

He can't fool me. I've got him taped.