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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·In addition to the up-and-down motion generated, surface waves also have a side-to-side motion.

除产生上下运动外，面波还会发生侧向移动。

3·For example, the follow-up response of the mark is lowered if a main shooting subject causes an up-and-down motion.

例如，如果主被摄体导致上下运动，则降低标记的跟踪响应。

4·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。

5·I found the quadrant throttle strange at first, unsure how far to move it to obtain the RPM I was after, with the sliding up-and-down motion feeling unnatural.

最初，我发现油门杆有点奇怪，不确定我需要拉杆拉多少才能到我需要的转速，飞机的上下运动也让人感到不太自然。

6·The simplest way to test the correctness of the total movement is to check whether the up-and-down motion of the arm results in a vertical path of the fingertips.

检验总运动的正确性的最简单的方法是核对上下运动的手臂，看看是否指尖的运行轨迹成一条垂直线。

7·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。

8·If I see you through the glass, the object is going on some trajectory, which has got both up and down and horizontal motion.

如果我透过窗户看你，物体在一些轨道上，有上升和下降，也有水平运动。

9·He walked up and down the room, to keep his blood in motion, soliloquising as before.

他在房间里踱来踱去，像刚才那样自言自语，使他的血液不停地流动。

10·A group of students from MIT also recently announced the development of a shock absorber for vehicles that USES the up and down motion when driving to generate electricity.

另外一群MIT的研究者们最近也开发了一种车用脉冲吸收器，它可以利用汽车运行过程中的上下振动来产生电能。