您能掩藏键盘和老鼠，当不在使用中。

That you can hide the keyboard and mouse when not in use.

youdao

该技术也能利用周围噪音甚至音乐来为不在使用中的手机充电。

The technology would also be able to harness background noise and even music to charge a phone while it is not in use.

youdao

在传统的微体系结构中，即使总线不在使用中，处理器也会将其打开。

In a typical microarchitecture, a processor has its bus turned on even when it is not in use.

youdao

So, conceptually if you've ever wondered why you get access in all of your functions to global variables that's because they're not down here, they're at the very top of RAM and any function can access that RAM way up there, but for now the interesting player in the story is this thing called the heap.

所以，如果你想知道为什么全局变量能在,所有的函数中使用,那是因为它们不在这下面，而是在内存的顶端,那样任意函数都可以在内存中使用它们，现在，这里面一个有用的角色是,叫做堆的东西。

哈佛公开课 - 计算机科学课程节选