1. Spacecraft tracking could look for a similar precession of Mars's orbit. 利用追踪太空船，也可以找寻火星轨道类似的进动。
2. Due to lunar precession, this time is longer than that if the perigee's position was fixed. 由于月岁差的关系，这个时间比近地点不变的情况下所需之时间长。
3. We used weak pulses of light to monitor the precession, in effect obtaining stroboscopic images of the spin dynamics. 我们用弱光脉冲来观测进动，取得了自旋运动的频闪观测影像。
英英解释
n.
1. the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out
2. the act of preceding in time or order or rank (as in a ceremony)
网络释义
precession 岁差;
进动;
旋进（进动），向前运动;
旋进;
backward precession 逆旋进;
反进动;
orbital precession 轨道旋进;
轨道进动;
precession camera 旋进照相机;
章动单晶照像仪;
进动照相机;
旋进照相机, 布依格照相机;
