epicycle

英汉释义

• n.

  1.【天】本轮

  2.【数】周转圆

英英释义

• 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

英汉例句

• 1.Venus goes through a full set of phases, proving that it must orbit around the Sun, not the center of the epicycle.

  金星亦有盈亏，证明它必定是环绕太阳运行，而不是均轮的中心。