动词短语
中文翻译：上床睡觉
同义词：
['go to bed', 'retire to bed', 'fall asleep']
例句：
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1. He took his dog to bed after dinner.
晚饭后他带狗上床了。
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2. The old man retired to bed early because of his illness.
由于生病，老人很早就上床休息了。
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3. She fell asleep quickly after drinking too much coffee.
她喝太多咖啡后很快就睡着了。