可以把延续看成在某一时间点上“冻结的”程序状态。
Think of a continuation as the state of a program at a frozen point in time.
应用程序基本上冻结了，然后过一段时间光标变化了。
The application essentially freezes and sometimes the cursor changes.
如果它的执行占用了显著的时间，那么在执行期间应用程序就会冻结。
If its execution takes any noticeable time at all, then the application freezes up during this execution.
应用推荐