up and down是什么意思 - up and down中文意思和解释
up and down基本解释
,上上下下；到处；前前后后；来来往往,同近
up and down相关例句和用法The escalator wafts us up and down every day..自动扶梯天天送我们上上下下。
up and down英英释义上上下下英释中释to a higher position and then a lower position, several times
up and down基本解释
,上上下下；到处；前前后后；来来往往,同近
up and down相关例句和用法The escalator wafts us up and down every day..自动扶梯天天送我们上上下下。
up and down英英释义上上下下英释中释to a higher position and then a lower position, several times