When the thread that has the lock leaves the critical section, the suspended thread needs to be woken up. The thread will need to be re-scheduling and context switched back into the CPU.

当拥有锁的线程离开临界区的时候，挂起的线程需要被重新唤醒，然后重新被调用，并交换上下文，回到CPU调度中。

In one scene, four roommates re-enact their first encounter: "Flashing back to these critical moments has helped us cherish our friendship."

其中一幕，四位室友再现初次见面时的情景：“回望那些及其重要的瞬间，使得我们更加珍视彼此的友谊。”

For instance, if the database is not mission-critical and 24x7, some downtime and loss of data may be acceptable, and re-keying of data may be an acceptable option should media failure occurs.

例如，如果数据库不是任务关键型和24x7型的，那么停机上一段时间和丢失一些数据可能是可以接受的，对于媒介错误，重新键入数据也可能是一种可以接受的方法。