qiān / wàn / bù / néng / yīn / wèi / yī / shǎn / niàn / jiù / zuò / chū / chōng / dòng / de / jué / dìng / 。

千万不能因为一闪念就做出冲动的决定。

Never make an impulsive decision just because of a sudden whim.