The optimal sprinkler configuration of center-pivot irrigation system can be obtained with the model, at the same time, the demand flow and head pressure were given.
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.