up and down

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

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