downward motion meaning in Chinese

下向运动
向下运动

The rapid downward motion of the fuselage is stopped by the impact through the landing gear .
起落架与地面的撞击阻止了机身迅速地向下运动。
Downward motion warms up the air and is favourable for evaporation
下沉过程会使空气温度上升，有利于水分的蒸发。
The only movement in the air was the soft downward motion of microscopic drops of moisture or mist
在空气中移动的唯有尘雾或者是晨雾中悄悄落下的细微的水珠。
A stroke in a game , such as tennis or badminton , that is made with a hard downward motion from above the head
过顶扣球如网球或羽毛球比赛中的一击，伴随着从头顶猛烈向下的动作
If the elbow is lifted a slightly higher than usual , it can be given the downward motion in anticipation of the bow change
在肘比正常情况提高一些时，能给下行运动一个换弓的预先准备。