epicycles

epicycles

美 　英

• n.【天】本轮；【数】周转圆
• 网络密则为宇宙增加了许多本轮；本轮之周另有小轮旋转为说

词形变化

复数：epicycles  

英汉解释

n.	1. 【天】本轮 2. 【数】周转圆

英英解释

n.	1. in the Ptolemaic theory of the solar system, a circle that is followed by a planet, the circle itself being centered on a larger circle within which is the Earth. 2. a circle that rolls around the circumference of another circle, either inside or outside

例句

Trying to describe how the five planets in the night sky followed seemingly irregular paths, Ptolemy hit upon an idea he called epicycles.

当设法解释夜空中的五颗行星为何好象沿着不规则的轨道运行时，托勒密脑海中闪现出一个观念，他称之为“本轮”。

The centers of the epicycles of Mercury and Venus must lie on the line joining the Earth and the Sun.

水星和金星的均轮中心，和地球及太阳中心永远连成一条直线。

Ptolemy added epicycles to the circular orbits of the heavenly bodies in order that his model might accurately describe their motion.

托勒密增加了天体环形运行轨道的本轮，为了使他的模型可以精确的描述运动。

These circles on circles, themselves called epicycles, dominated astronomical thinking for the next 1, 800 years.

这种绕圈移动的圆就叫做周转圆，这想法在天文界维持了1800年。

Strange epicycles are the result, instead of good arcs.

结果是奇怪的轨迹，代替了好的弧线。