在她北京办公地点外面的人行道上,曹达垂(音)从一辆时尚小巧、橙银两色的自行车上下来,她踢下车子的金属脚撑,锁上后轮。从附近的地铁站骑行半英里来到这里只花了14美分,而且她可以随便停放这辆自行车。“实在太方便了,”27岁的小曹说。干燥的春风吹乱了她的头发,公共汽车和小轿车从旁边呼啸而过,喷出味道刺鼻的汽油尾气步 On the sidewalk outside her Beijing office, Cao Daozuo went up from a sleek, silver-orange bike, and kicked down the metal support of the car and locked the rear wheel. It took just 14 cents to get half a mile from a nearby subway station and she could park the bike casually. “It’s really convenient, ” said 27-year-old Cao. Dry spring breeze her hair, buses and cars roaring from the side, spit out the pungent smell of gasoline tail gas step