to not be thinking clearly or using good judgment

沒想清楚，沒好好動(dòng)腦筋

I'm sorry, that was a stupid thing to do - I wasn't thinking straight.

對(duì)不起，那樣做太愚蠢了——我當(dāng)時(shí)沒有想好。

Don't assign him anything else right now—he's so stressed about this case that he can't think straight.

現(xiàn)在別再給他安排別的事了——他對(duì)這個(gè)案子壓力太大，腦子都不清楚了。