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modes means of transportation vehicle decline densely-populated soar packed crowded be squished up population explosion population boom impose higher taxes on pedestrian fine sardine-packed hazardous subway car limo fleet
交通方式 modes/ means of transportation 交通工具 n. vehicle 下降 n.&vi. decline 人口稠密的 adj. densely-populated 激增 vi. soar 拥挤的 adj. packed/ crowded 被挤在……里 be squished up 人口爆炸，人口激增 population explosion/ population boom 提高征税 impose higher taxes on 行人 n. pedestrian 罚款 vt.&n. fine 行人公交像沙丁鱼罐头那么拥挤 adj. sardine-packed 危险的 adj. hazardous 地铁的一节车厢 subway car 加长轿车 n. limo 车队 n. fleet