英语词汇up-and-down motion怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

网络释义

1
?垂直方向往复运动
垂直方向往复运动

短语

1
up and down motion
上下起伏
2
up-and-down or to-and-fro motion
上下或往复的移动

双语例句

1
Using either a circular or jiggling, up-and-down motion, brush this area with your toothbrush.
牙刷以圆周或者上下簸动的方式来刷这块区域。
2
The connecting rod transmits the up-and-down motion of the piston to the crankshaft, which changes it into rotary motion .
那连接竿送活塞的上上下下运动到机桥，将它换成旋转的运动。
3
It was only that one day I happened to be walking behind them, and the curious up-and-down motion of a load of wood drew my attention to the human being beneath it.
真正看到她们的那天是我碰巧走在她们后面，那古怪的一上一下晃动的一担柴禾引起了我对它下面的人的注意。

单词	up-and-down motion
释义	up-and-down motion 简明释义垂直方向往复运动网络释义 1 ?垂直方向往复运动垂直方向往复运动短语 1 up and down motion 上下起伏 2 up-and-down or to-and-fro motion 上下或往复的移动双语例句 1 Using either a circular or jiggling, up-and-down motion, brush this area with your toothbrush. 牙刷以圆周或者上下簸动的方式来刷这块区域。 2 The connecting rod transmits the up-and-down motion of the piston to the crankshaft, which changes it into rotary motion . 那连接竿送活塞的上上下下运动到机桥，将它换成旋转的运动。 3 It was only that one day I happened to be walking behind them, and the curious up-and-down motion of a load of wood drew my attention to the human being beneath it. 真正看到她们的那天是我碰巧走在她们后面，那古怪的一上一下晃动的一担柴禾引起了我对它下面的人的注意。
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