The length of the year, in fact, is determined from this apparent motion of the sun among the stars.
事实上，一年的长短就是根据太阳在恒星中的这种视运动而确定的。
He considered that it was caused by the non-uniformity of the apparent annual motion of the sun.
他认为这是由太阳周年视运动的不均匀引起的。
He considered that it was caused by the non-uniformity of the apparent annual motion of the sun.
他认为这是由太阳周年视运动的不均匀引起的。
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