precession是什么意思_precession怎么读_音标pri'seʃәn

precession是什么意思音标:英 [pri'seʃәn]

n. 先行, 优先
[化] 进动; 旋进

n. the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
n. the act of preceding in time or order or rank (as in a ceremony)