词典释义：
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Some students often doze off in class.
有些学生经常在课堂上打瞌睡。
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We couldn't help but doze off during his lecture.
他演讲时我们忍不住打瞌睡。
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I occasionally doze off, only to be awakened by the agonizing pain of another collapsed vein and infiltrating fluids.
我时不时地会打一会瞌睡，但每次都被静脉破裂和输液的液体漏出引起的难忍的痛苦弄醒。
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Do you sometimes doze off in class?
你上课偶尔会打瞌睡吗？
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I won't doze off here.
我不会打瞌睡的。
打瞌睡，读音为dǎ kē shuì，指打盹。例句为“小明夜里没睡好觉，上课直打瞌睡。” 相关句子有“（主人们）有时在这里卜神课，无聊时就打瞌睡。”出自曹禺的《北京人》。