He said Americans would always build a house but then move before they put a roof on it.

他说,美国人盖房子,总是在还没有盖上屋顶时就搬走了

耶鲁公开课 - 美国内战与重建课程节选

We don't have a roof on our car.

我们的车也没有车顶。

What if 实战 - SpeakingMax英语口语达人

Now this is a rain gauge, and it's sitting on a roof of a building, and when the water falls into this gauge, it sends a signal to the logic unit of the computer, which immediately notifies the memory bank of the computer to seek out its instructions for a rainy day.

这是一个雨量测量器，安装在一个楼房的,屋顶上，当水流入到这个测量器，它就给计算机的逻辑部件发送一个信号，计算机立即通知内存条,为下雨天找出相应的指令。

哈佛公开课 - 计算机科学课程节选

A shudder in the loins engenders there The broken wall, the burning roof and tower And Agamemnon dead.

腰肢的猛一颤动,残破的墙垣，燃烧的屋顶和塔巅,阿伽门农死去。

耶鲁公开课 - 现代诗歌课程节选

And whew! She's flying off the roof with anger, chasing him around the house trying to whip him with a wet towel, so on and so forth: a very dramatic scene again of powerlessness within the family, of being the victim of violence within the family.

噢！在房子里，祖母气急败坏地用湿毛巾追着打他，一会窜这儿，一会窜那儿：,这是理查在家里无能为力，再次成为家庭暴力受害者的又一典型案例。

耶鲁公开课 - 1945年后的美国小说课程节选