These collect rainwater. But the device is designed to collect water even when there is no rain.

VOA: special.2010.07.13

More specifically, what I meant was, when you showed the example of Rain Man, are they exceptional .... Right. The question is about so-called autistic savants.

我想说的是,具体而言,比如说雨人这样的,他们都是特例吗,好的,这是个关于孤独症学者的问题

耶鲁公开课 - 心理学导论课程节选

you know how it gets when it's about to rain.

你知道很快就要下雨了。

I'm going to 课堂 - SpeakingMax英语口语达人

When rain and melting snows flow over a city's streets, parking lots and sidewalks, that runoff picks up all kinds of pollutants residues of petroleum and pesticides, soaps and solvents, as well as pet and wildlife waste.

VOA: standard.2010.08.04

When little holes come along, that's rain coming through.

当出现小洞时，便有了雨水。

耶鲁公开课 - 旧约导论课程节选

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