岁差

suì chā zhī suǒ yǐ tè bié zhòng yào shì yīn wèi tā yǐn qǐ zuò biāo d hé bǐ jiào xùn sù de biàn huà

岁差之所以特别重要是因为它引起坐标d和б比较迅速的变化。

Precession is of utmost importance since it causes relatively rapid changes in coordinates d and б.