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smoke+fog =smog (煙霧) laboratory=lab breakfast+lunch =brunch (早午餐 ) SOS BTW DIY MSN DL VOA IC RUOK THX by the way do it yourself I see Are you OK? Thanks messenger Abbreviation (縮寫 ) save our soul / ship down load Voice of America telephone manned international uncountable mankind broadband underground madetoorder plane cycle lab ad photo exam phone fridge bike IT CSA IOC hitech Xmas NATO brunch smog motel telecast Affixation (派生 ) 通過加前后綴形成新詞 Compounding (合成 ) 由兩個或多個詞合