The Evening Star is the, roughly speaking, first heavenly body that's visible in the sky as it gets dark, at least at certain times of the year.

粗略说来,昏星就是,天黑时第一个能看见的天体,至少在一年的某个时间段是这样

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So as a first pass, the Evening Star is the first star that's visible and the Morning Star is the last star that's visible at the right times of the year.

在最初,昏星是能看到的,第一颗星,而晨星,是最后一颗,当然是在每年的特定时段

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