up and down

初中

中文释义

上上下下英释中释

英语释义

上上下下英释中释to a higher position and then a lower position, several times

相关例句

1 The escalator wafts us up and down every day..自动扶梯天天送我们上上下下。

2 What you do is squat up and down really fast..你 所要做的就是真正快速地上下蹲坐。

up and down