Unit 2 Air wind 风风 smell 闻，气味闻，气味 taste 品尝品尝,气味气味 breath 呼吸呼吸 open 打开的打开的 closed 关闭的，封闭的关闭的，封闭的 object 物体，物品物体，物品 square正方形的正方形的 handkerchief 手帕，纸巾手帕，纸巾 corner 墙角墙角 parachute 降落伞降落伞 hit 击打击打 heavy 重的重的 heavily 重地，沉地重地，沉地 high 高高 hurt 疼痛，受伤疼痛，受伤 dirty 肮脏的肮脏的 metre 米米 power station 核电站核电站 flight 飞行，空中航行飞行，空中航行 cry 哭哭 where does air pollution come from? It comes from smoke from traffic. smoke from the traffic smoke from the aeroplanes smoke and dust from the factories the smoke and dust from the power stations dust from the construction sites
