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1·Downward movement is much faster than upward one.

向下移动比向上移动快得多。

2·This downward movement forces the valve to move downward off its seat so that it opens.

向下的运动使气门向下移动离开气门座，气门被打开。

3·Downward movement with the Fast and Feeding speed, the fast forward improve work efficiency;

下压行程具有快进与工进两种速度， 快进提高工作效率；

4·Most conventional downhole tools operate by upward or downward movement, rotation, or a combination of both.

大多数常规井下工具都是由向上或向下移动、旋转或两者相结合进行工作。

5·A upward movement means the price stays strong whereas a downward movement means the price is going slump abruptly.

向上跳空代表价格走势强劲，向下调控代表价格急剧转疲。

6·It is precisely that the vulgarization and the downward movement of the upper class's mysticism was the reason of this situation.

正是由于玄学从上层社会的向下移动和庸俗化，才导致了这样的局面。

7·Air and fuel are drawn into the cylinder by the downward movement of the piston, the piston then moves up and squeezes this mixture which is then ignited.

空气和燃料，是由各该活塞向下运动，活塞然后移动起来，这是挤出，然后点燃混合气进入气缸。

8·The upper end of the upward-downward movement mechanism is provided with a cylinder piston connected with a jointing part of a pair of long connecting rods.

下运动机构上端是一个气 缸活塞与一对长连杆的交接处相接；

9·A centrifugally activated device for controlling the speed of movement of an elevator cab includes the capability of controlling upward and downward movement.

一种用于控制电梯车厢运动速度的离心致动装置，包括控制向上和向下运动的能力。

10·Large intake vents open so that the output pressure off small increase, thus putting downward movement so that implementing agencies spool valve to open or close.

进气口开大排气口关小使输出压力增加，因此执行机构推杆向下移动使调节阀阀芯开启或关闭。