Essentially, the strategy is to create a bunch of widgets with callbacks, then enter a main event loop.

本质上，这个策略是创建带回调的一串窗口小部件，然后进入一个主事件循环。

youdao

The last thing we need to do is activate our POA to start queuing client requests and force the server to enter its event loop to receive those incoming requests.

最后要做的一件事，就是激活poa，使客户机请求开始排队，并强制服务器输入其事件循环，以接收这些传入的请求。

youdao

Select the Loop check box, then enter the value of 2 for both the Start row and End row fields.

选中Loop复选框，然后为Start行域和End行域都输入值2。

youdao

Then the next thing in the loop, we're going to enter a nested loop and say for every college in the list e, we're going to print the name of the college.

循环中的第二件事，是进入一个嵌套循环,这个嵌套循环将数组中的，大学名字显示出来。

麻省理工公开课 - 计算机科学及编程导论课程节选

So first time through the loop, the answer is a. Second time it-sorry, as it enters the loop, at the time it enter exits a the answer is a.

当第一次完成循环的时候，答案是a，第二次，对不起，在第一次进入循环的时候,答案就是。

麻省理工公开课 - 计算机科学及编程导论课程节选