Roland LeGiardi-Laura says life feels out of control for a lot of the children he works with.

VOA: special.2009.04.27

It works by a control mechanism called negative feedback, and the thermostat is measuring the temperature and then sending a signal to a heater somewhere.

是通过一种叫做负反馈的控制机制,探测器测量温度,再把信号传给加热器

耶鲁公开课 - 生物医学工程探索课程节选

It turns out that in a lot of languages, C included, you the programmer knowing a bit about how the computer works and the language works, can exercise more fine-grained control.

结果在包括C语言的很多语言当中，你作为一个程序员懂得了一些计算机的工作方式,和语言的处理方式，可以更精确地控制运用它。

哈佛公开课 - 计算机科学课程节选

Michael Bahtiarian works for Noise Control Engineering, the company which helped design the boats.

VOA: special.2011.06.29

She works for the Centers for Disease Control and Prevention in Fort Collins,Colorado.

VOA: special.2009.04.13