PHRASAL VERB 睡在…；在…过夜 If you bed down somewhere, you sleep there for the night, instead of in a bed. 睡在…；在…过夜
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On those nights when they could find no monastery or inn to take them in, they bedded down in the fields. [VERB PREP. prep./adv.]
那几天晚上，他们找不到可以投宿的修道院和客栈，只好露宿野外。
SYN sleep, lie down, retire, turn in [informal]