Definition
To lack clarity of thought or sound judgment.
思緒混亂
I didn't sleep well last night, so I'm not thinking straight this morning.
我昨晚沒睡好，所以今天早上思緒不清。
When you're extremely fatigued, it's hard to make the right decisions because you're just not thinking straight.
當你極度疲勞時，很難做出正確的決定，因為你思緒不清。
He was distraught after hearing the bad news, and he was talking a bit incoherently, obviously not thinking straight.
他聽到壞消息後心煩意亂，說話有點語無倫次，顯然思緒不清。