The break condition can be defined for the wait in the until function, or extend the wait class to implement.
可以在until函数中定义等待的退出条件,或者扩展wait类来实现等待退出。
When people have to pay for care, they tend to wait until a condition is so far advanced that treatment is difficult, if not impossible, and the costs are much higher.
如果必须为医疗自掏腰包,人们有时会错失良机,等病情过于严重时才去就医,而那时已很难治疗,有的甚至为时过晚,费用也高得多。
Next, since the searches take place in an asynchronous fashion, we must submit a search, wait for the result callback, check for the terminating condition, and then submit another search.
其次,由于搜索是以异步方式进行的,所以我们必须提交一个搜索、等待结果回调、检查中止条件、然后提交另一个搜索。
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