firstclass
adj. 一流的；一等的
adv. 一流地；极好地
例句
You are turning a firstclass zonker.
你正在变成一号瘾君子啦。
Firstclass ticket to Birmingham, please.
请给买一张到伯明翰的头等票。
The film should be very good as it is starring firstclass actors.
这部影片是一流演员主演的，可能拍得很好。
