epicycles

美 　英

• n.【天】本輪；【數(shù)】周轉圓
• 網絡密則為宇宙增加了許多本輪；本輪之周另有小輪旋轉為說

詞形變化

復數(shù)：epicycles  

英漢解釋

n.	1. 【天】本輪 2. 【數(shù)】周轉圓

英英解釋

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.

當設法解釋夜空中的五顆行星為何好象沿著不規(guī)則的軌道運行時，托勒密腦海中閃現(xiàn)出一個觀念，他稱之為“本輪”。

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

水星和金星的均輪中心，和地球及太陽中心永遠連成一條直線。

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

托勒密增加了天體環(huán)形運行軌道的本輪，為了使他的模型可以精確的描述運動。

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

這種繞圈移動的圓就叫做周轉圓，這想法在天文界維持了1800年。

Strange epicycles are the result, instead of good arcs.

結果是奇怪的軌跡，代替了好的弧線。