/ˈekstrə ||; ˈɛkstrə/adjadvmore than is usual, expected, or than exists already 超过平常的；额外的；外加的: I'll need some extra money for the holidays.我需要多一点的钱来度假。‘What size is this sweater?’ ‘Extra large.’“这件套衫是什么尺码的？”“特大号。”Is wine included in the price of the meal or is it extra?酒是算在饭钱里，还是另计的？I tried to be extra nice to him yesterday because it was his birthday.昨天是他的生日，我尽量待他格外好一些。
extra²
/ˈekstrə ||; ˈɛkstrə/noun[C]
1 something that costs more, or that is not normally included 额外或额外收费的事物: Optional extras such as colour printer, scanner and modem are available on top of the basic package.除了基本的套件以外，还供应彩色打印机、扫描仪和调制解调器，不过要另外收钱，可买可不买。
2 a person in a film, etc who has a small unimportant part, for example in a crowd （电影等的）临时演员