西方的行车安全距离概念在中国毫无意义。
Western notions of what is a safe distance between cars mean little in China.
她教他们这样游泳，她教他们怎样排成一列队，与自行车、摩托车和其它有轮胎的东西保持安全距离。
She taught them how to swim and dive. She taught them to walk in a line, to come when they were called, and to keep a safe distance from bikes and scooters and other things with wheels.
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