center of parallel force system

例句：

1. 1. The design of thenew car is centered around a newengine.
   这款新车的设计以新的发动机为中心。
2. 2. Theresearch on the center of parallel force systemhas made significant progress in recent years.
   关于平行力系统中心的研究成果近年来取得了显著进展。
3. 3.The center of parallel force system plays animportant role in the stability of the system.
   平行力系统中心在系统稳定性中起着重要作用。