caller的意思是:n.打电话的人;来访者;呼叫者。caller的英英释义是Noun:a social or business visitor;"the room was a mess because he hadn't expected company"an investor who buys a call optionthe bettor in a card game who matches the bet and calls for a show of handsa person who announces the changes of steps during a dance;"you need a fiddler and a caller for countr