For such cases, it is useful to poll the asynchronous operation to determine whether the operation has completed or not.
对于这些状况，轮询非同步作业以判定作业是否完成是很有用的。
For such cases, it is useful to poll the asynchronous operation to determine whether the operation has completed or not.
对于这些状况，轮询非同步作业以判定作业是否完成是很有用的。
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