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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And this is useful because if you're actually writing a program that's interactive or that you want to change overtime much like you would a game, hopefully, the game is not going to have the bad guys, for instance, always standing in the same place or the rocks or whatever it is falling from the sky in the same place 'cause it would very quickly become a very tedious game.

这是很有用的，因为如果,写一个交互的程序或者,希望每次游戏都不一样，我们希望，游戏中的坏人物，别老是站在同一个地方或者同一块石头上,或者从天空中同样的位置落下,因为这立刻会使游戏变得乏味。

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Still, that's not a world in which the Morning Star doesn't exist, given that what we mean by the Morning Star is that heavenly object, whatever it is, that in this world we pick out at that time in the morning looking up at the sky.

但这并不是意味着,晨星在这个世界不存在,如果给定了晨星的意思就是,一个这样的天体,不管它到底是什么,在这个世界上,在早晨的那个时候我们仰望天空,就能看到的那个天体

耶鲁公开课 - 死亡课程节选