雷声在天空中隆隆作响。

Thunder boomed in the sky overhead.

《牛津词典》

他们看到了一颗明亮的星在天空中闪闪发光。

They beheld a bright star shining in the sky.

《牛津词典》

星星在天空中闪烁。

Stars twinkled in the sky.

《牛津词典》

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。

哈佛公开课 - 计算机科学课程节选