Lesson 16 A polite request一. New words and expressions1. park n.公园 the Central Park中央公园 v. 停车 parking lot停车场 car park No parking!禁止停车!eg: You cannot park in this street.你不能在这条街上停车。2.traffic un.交通 a traffic accident交通事故 traffic lights 交通信号灯traffic regulations交通法规 traffic policeman交通警察traffic jam/ heavy traffic交通堵塞3.ticket cn.票(机票,车票,电影票或入场券) eg: Do you want a single or a return ticket? 你想要单程票还是往返票呢?cn.(交通违章)罚款单 get a parking ticket