This article has been a quick tour of pattern matching in F# and introduced its new active patterns feature.

这篇文章是F#中模式匹配的一个快速浏览，并介绍了它的新活动模式的特性。

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Highlights include the Air Force Flight Test Center Museum, the food court and gift shop at the NASA Dryden Flight Research Center and a "windshield tour" near the flight line where F-16s, KC-135s, F-22s, F-35s, B-1s or C-17s might be visible, said the spokesman.

CNN: Where planes go to die

V. to tour those hot spots beloved of U.F.

NEWYORKER: Out There

General Motors and Ford sponsored some of our events, but my tour of the Ford Rouge factory, where workers assembled the Ford F-150 pickup, was paid for out of my own pocket and it was well worth it for a car design lover and transportation geek like myself.

FORBES: An Eye-Opening Trip To The Motor City