Specifies that the object can use either apartment or free threading, depending from which kind of a thread it is created.
指定对象可使用单元线程或自由线程，具体取决于创建它的线程类型。
Equivalent to single thread apartment.
等效于单线程单元。
The most probable cause is that a single-threaded apartment (STA) thread is not pumping messages.
原因很可能是单线程单元 （STA）线程不发送消息。
The most probable cause is that a single-threaded apartment (STA) thread is not pumping messages.
原因很可能是单线程单元 （STA）线程不发送消息。
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