It covers itself in snow when it sleeps.
它在睡觉的时候用雪包围自己。
When it sleeps, it USES its hind legs to hang itself upside down.
当它睡觉时，它用后腿把自己倒挂起来。
The smile that flickers on baby’s lips when he sleeps—does anybody know where it was born?
当孩子睡时,在他唇上浮动着的微笑--有谁知道它是从什么地方生出来的?
This clock governs when an animal eats, sleeps and reproduces: it is hard to overstate how important it is at helping animals adapt to changing conditions throughout the seasons.
生物钟控制动物吃东西、睡眠及繁殖的时间：生物钟有助于动物适应四季的变化，这一点极其重要。
This makes it tough to follow the first rule of having a newborn: sleep when the baby sleeps.
这使得你难以按照育儿的第一条规则去做：孩子睡，我们睡。
The smile that flickers on baby's lips when he sleeps — does anybody know where it was born?
婴儿沉睡时唇边闪现的微笑，有谁知道它来自何方？
Our need for notifiers arose when we created a service that starts a socket listening. While waiting for incoming connections, the calling thread sleeps as it awaits notification.
我们对事件通知机制的需求来源于当我们创建一个用来监听连接套接字的服务时。被调用线程在等待连接到来的时候一直处于睡眠状态，直到接收到了一个事件通知。
The smile that flickers on baby's lips when he sleeps----does anybody know where it was born?
你知道吗？婴儿唇边闪烁着的一抹甜甜的微笑来自于何方？
The smile that flickers on baby's lips when he sleeps----does anybody know where it was born?
你知道吗？婴儿唇边闪烁着的一抹甜甜的微笑来自于何方？
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