prepare for sleep
同义词：go to bed??/??turn in??/??bed??/??crawl in??/??kip down??/??hit the hay??/??sack out??/??go to sleep??/??retire
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。