Prisons are having to pack in as many inmates as possible.监狱只好拼命往里面塞犯人。Why don't you pack in when you feel dizzy?你觉得头晕时,为什么不停止工作?You pack in as tightly as you can.你们尽量往里挤....

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pack in的音标：pack in的英式发音音标为：[pæk in]pack in的美式发音音标为：[pæk ɪn]...