本文提出了一种分析空间机构传动特性的方法，并应用于球叉式联轴器运动分析。
This Paper presents an analytical method on the investigation of the motion characteristics of spatial mechanism, with it applied to the Ball-and-Trunnion Type of Joint, i. e, the Multiple-Pode Joint.
球不能被认定是移动了，因为相对于它所停的树叉来说它并没有移动。
The ball is deemed not to have moved since it did not move in relation to the fork of the tree in which it was lodged.
洋基喜欢他制造滚地球的能力，也希望他的指叉球可以继续进化。
The Yankees like his ability to induce ground balls, and they are hopeful his splitter will continue to improve.
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