The piston has a single centerpivot that drives each gripper jaw open and closed.
活塞有一个单一的中心枢纽，驱动每夹钳颚开启和关闭。
2
We politely circumvented the spud field and picked up her track on the far side, between several more center-pivot circles, blooming bright yellow and rank with canola.
我们斯文地绕过土豆地，在远侧几个中心旋转系统圈之间找到它的踪迹，那里盛开着繁茂的亮黄色油菜花。
3
Stars orbit the pivot point at the center of galaxies, planets in turn orbit stars, and moons in turn orbit planets.