pre.ces.sion
n.（名词）The act or state of preceding; precedence.先行：向前运动的行为或状态；先行Physics The motion of the axis of a spinning body, such as the wobble of a spinning top, when there is an external force acting on the axis.【物理学】 进动：当受到外力作用时旋转体轴的运动，如旋转陀螺般的摇摆Astronomy 【天文学】 Precession of the equinoxes.分点岁差A slow gyration of Earth`s axis around the pole of the ecliptic, caused mainly by the gravitational pull of the sun, moon, and other planets on Earth`s equatorial bulge.岁差：地球中轴绕黄道极的缓慢旋转，主要由于太阳、月亮和其它星体对地球赤道降起带的重力作用而造成
来源：Late Latin praecessiô praecessiôn- 后期拉丁语 praecessiô praecessiôn- from Latin praecessus [past participle of] praecôdere [to go before] * see precede 源自 拉丁语 praecessus [] praecôdere的过去分词 [回到从前] *参见 precede
【引伸】
preces.sional
adj.（形容词）
