该结 构的接触式心跳测量器在测量生理信号时，使用者两手所接触处仅 各需要一个感测元件即可达到测量心跳的功能。

When the contact type heart beat measuring device is used, the testee has his two hands contacted with two separate sensing elements for measuring the heart beat.

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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