means用照片比谁厉害，看谁能kill the competition.

来源: pinkdreams 于 2013-02-20 12:23:32 [] [旧帖] [给我悄悄话] 阅读数 : (64 bytes)
回答: What does PK stand for? 由 ZoyaWashington 于 2013-02-20 12:17:30

I think origianlly PK means "Player Kill" in MMORPG term.

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