Foreground and Background Threads 前台线程和后台线程
Explains the differences between foreground and background threads.
解释了前台和后台线程的区别。
If you need to run background threads that interact with the user interface, the.
如果您需要执行与使用者介面互动的背景执行绪，。
Often, keeping track of the background threads in this kind of environment can be a challenge.
通常，在此类环境中跟踪后台线程会是一项挑战。
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