roller blade 这是个名词词组吧,为什么可以直接说：I can roller blade.

roller blade 这是个名词词组吧,为什么可以直接说：I can roller blade. roller blade什么意思 Can you roller blade? 啥意思? roller skate & roller blade有什么区别? are you roller blade? yes,i Am a.are B. can C.do ________you roller blade?yes,i Am a.are B.can C.do roller blade 和skate的区别 skate 和roller blade的区别 roller blade的现在进行式是什么? roller blade pitch 直接引语变间接引语 Mr.Blade said,"I made the plane yesterday afternoo