特殊用法apparent precession1.视[自然]进动general precession1.【天】总岁差gyroscopic precession1.陀螺进动lunisolar precession1.【天物】日月岁差orbital precession1.轨道旋进[进动]precession in declination1.【天】赤纬岁差precession in right ascension1.【天】赤经岁差