I try to go back to sleep and toss and turn for a while.
我努力重新入睡,辗转反侧了一会儿。
If you're volunteering for the adventure playground area, let's start from the car park again and go up the footpath, but then you want the first left turn.
假设你是儿童游乐园的志愿者,我们再从停车场开始,沿着人行道走,但你就应该在第一个路口左转。
The calls act as a warning to other threads to go to sleep and wait their turn for the mutex lock.
这两个函数调用的作用就是警告其它线程,要它们继续睡眠并等待轮到它们对互斥对象加锁。
So we know that it'll go up for one second then it will turn around and come back.
我们知道了,物体在上升一秒后开始下降
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