precession 是什么意思

	n. 1.前行，先行。 2.前进运动，进动；【天文学】岁差。短语和例子 precession of the equinoxes 【天文学】(分点)岁差。 adj. -al 岁差的；进动的。

	the act of preceding in time or order or rank (as in a ceremony) 同义词：precedence, precedency,
	the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone

	1.	This gyroscopic motion is called precession . 此陀螺运动叫做进动。
	2.	He then accounts for the precession of the equinoxes . 然后他解释分点岁差。
	3.	The so-called lunisolar precession is caused by the inequality of the moments of inertia of the earth . 所谓日月岁差，是由于地球转动惯量的不相等造成的。
	4.	The tilting of the gyro continues until the erection torque balances the torque producing the precession . 陀螺继续倾斜直至修正力矩与产生进动的力矩平衡。
	5.	Another characteristic of sun-earth system is the gradual precession of the equinoxes and solstices along the orbit . 日地系统的另一个特点是二分点和二至点沿轨道逐渐运动。
	6.	precession is of utmost importance since it causes relatively rapid changes in coordinates d and б. 岁差之所以特别重要是因为它引起坐标d和比较迅速的变化。
	7.	Another test, involving the precession of a gyroscope in a satellite circling the earth, is scheduled for the 1970s . 七十年代还安排了另一实验，它包括绕地球旋转的卫星中的陀螺进动性试验。
	8.	And calculated the anomalous precession of the orbit of mercury 计算出水星轨道进动的
	9.	The wobble and precession - nutation on cip of elastic earth 弹性地球cip轴的极移和岁差章动
	10.	It goes backward , and is therefore called a precession 它有前向后推，因此称做一个岁差。

precession是什么意思