In this domain Ptolemy created a model of the solar system in 150 AD using circles and epicenters.

在这个领域，托勒密于公元150年创建使用圆圈和中心点创建了太阳系的一个模型。

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The little flock of golden birds continued to twitter in circles around her head so that she looked like a strange, feathery model of the solar system.

那群金黄色的小鸟继续围着她的脑袋叽叽喳喳地飞着，这使她看上去像一个奇怪的、长着羽毛的太阳系模型。

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When using low power system aims at target, the graduation form is as shown in Fig. 4, it is the graduation of three concentric circles.

用低倍系统瞄准目标时，分划形式见图4，分划形式是三个同心圆的分划。

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Its system of Circles is far too messy to really be useful in the same way.

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