讲解文本：
sober 清醒的，未醉的 He was drunk yesterday , but now he is sober. 他昨天喝醉了的,但现在是清醒的。
sober up 使清醒 I need a cup of tea to sober myself up. 我需要一杯茶来醒醒酒。
疯狂练习吧！
