铸成大错

nà zài dàng shí sì hū shì gè hǎo zhǔ yi dàn hòu lái zhù chéng dà cuò

那在当时似乎是个好主意，但后来铸成大错。

It seemed like a good idea at the time, and then it all went horribly wrong.

tā yīn wèi shōu le tā men de qián zhù chéng dà cuò hài le zì jǐ

他因为收了他们的钱铸成大错害了自己。

He has irretrievably compromised himself by accepting money from them.

xiǎo shī wù huì zhù chéng dà cuò

小失误会铸成大错。

Little mistakes lead to big ones.