birds can fly thousands miles by observing positions of stars in the sky in relation to the time of

问题描述:

birds can fly thousands miles by observing positions of stars in the sky in relation to the time of
day and year.这句话怎么翻译?in relation
我记得好像“IN RELATION TO ” 是“相对.....而言”的意思,那么在这里就翻译不通了啊?

鸟儿靠观察不同季节和时间天空中行星的位置可以飞行数千里.
in relation to与...的关系,参照关系
day and year是指一年和一天中不同时间太阳在空中的位置