First of all, if we want to know about the Dark Ages, what sources do we have available to us?

首先,如果我们想了解黑暗时代,我们有什么资料可寻呢

耶鲁公开课 - 古希腊历史简介课程节选

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

耶鲁公开课 - 死亡课程节选