doze off

「打瞌睡」是指因為疲倦而小睡，通常是熬夜或是激烈運動後造成精神不濟而產生上述現象，英文說法除了可以用片語 doze off 或 nod off 來表達之外，也可以用動詞 catnap 或 snooze。

例句：
The teacher caught Jeff dozing off in class again today. 老師今天又抓到傑夫在課堂上打瞌睡。
The movie was so boring that I kept dozing off. 那部電影超無聊的，所以我一直打瞌睡。

thanks. now i know it's different between doze off and take a nap.