The piston has a single center pivot 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。
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。
Stars orbit the pivot point at the center of galaxies, planets in turn orbit stars, and moons in turn orbit planets.
恒星围绕着星系轴心转，行星围绕着恒星转，卫星围绕着行星转。
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