Unit 21 subway 美地铁I want to get there by subway.我想乘地铁去那儿2 elevator n.电梯；升降机I go up by the elevator.我搭电梯上去I took the elevator to the third floor.我坐电梯上了三层3 petrol 英汽油（ = 美 gasoline ）4 gas 汽油；气体；煤气；毒气。Gas is used for cooking 煤气用来烧饭Is there a gas station nearby? 附近有加油站吗?5 official adj.官方的；正式的；公务的Is the news official? 这消息是官方发布的吗?6 voyage n 航行；航海She has taken a voyage to Japan .她航行去了日本7 conquer 征服；占领Conquer the desire, or they will conquer yo
