英语词汇“up and down”的读音、翻译、释义、用法及例句-Yue音乐在线

词汇	up and down
释义	up and down phr ① 上下地;来回地;到处 The children went up and down in elevators.那些孩子乘坐电梯上上下下。 They walked up and down in the park.他们在公园里来回走动。
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