英语词汇“up-and-down motion”的意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	up-and-down motion
释义	up-and-down motion 汉语翻译【化】垂直方向往复运动; 上下运动
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英语词典包含435040条英汉在线翻译词条，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。

up-and-down motion