act (a) perform a part in a play or film; be an actor or actress （在戏剧或电影中）演出; 当演员例如：Have you ever acted? 你当过演员吗? * She acts well. 她演得很好. (b) take the part of (a character in a play or film) 扮演（戏剧或电影中的角色）例如：Who is acting (the part of) Hamlet? 谁扮演哈姆雷特（这个角色）?
