This MDA is activated if an STA thread USES com interoperability either directly or indirectly through the common language runtime or a third-party control.

如果STA线程通过公共语言运行时或第三方控件直接或间接使用COM互操作性，MDA将被激活。

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The only contact with the foreign Trailmen is through trade conducted once a year in silence and by sign language, since the isolated tribes are thought to have no common language.

NPR: From New York State: Science, Fiction and Bar Yarns