一个或几个万向节来适应传动角度的变化；
There must be one or more universal joints to permit variations in the angle of drive.
使变速器和差速器之间的传动角度和距离发生变化。传动轴要能适应这些变化。
This changes the Angle of drive and the distance between the transmission and the differential, and the propeller shaft may take care of these two changes.
一个或几个万向节来适应传动角度的变化；一套伸缩花键，能够改变传动轴的现有长度。
There must be one or more universal joints to permit variations in the Angle of drive. there must also be a slip joint that permits the effective length of the propeller shaft to change.
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