up and down什么意思？ up and down翻译(中文文)：上下地,

怎么读（音标）：[ʌp ənd daʊn]

用法：up and down是一个固定搭配，表示“向上和向下”、“上下起伏”、“来回移动”等含义。常用于描述物体的运动或者人的情绪变化。

例句1-5句且中英对照：

1. The elevator went up and down between floors.

电梯在楼层间来回运行。

2. She was feeling up and down about the job interview.

她对这次工作面试感到忐忑不安。

3. The stock market has been going up and down recently.

股市近期一直在起伏不定。

4. The children were jumping up and down with excitement.

孩子们兴奋地跳来跳去。

5. He looked up and down the street, trying to find his lost key.

他沿着街道上下打量，试图找到丢失的钥匙。

同义词及用法：upward and downward、rise and fall、fluctuate等均可替换up and down，表示相同的意思。

编辑总结：up and down是一个常用的固定搭配，通常用于描述物体的运动或者人的情绪变化。在使用时可以根据具体语境选择合适的同义词替换。