外教讲解地道美语 第227期:准备睡觉
2011-09-12来源:和谐英语
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get to sleep 睡着
nightmare n.恶梦
sleeping disorder 睡眠混乱
sedative n.镇静剂
sleeping pattern 睡眠时间
do the trick 有效
go to sleep 入睡
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