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一阵秋风吹过,地上的落叶为什么像长了翅膀一样飞舞起来?汽车驶过会带起很多灰尘。在火车站候车时为什么要站在白色安全线以外?两艘船为什
When the autumn wind blows, why does the ground leaves fly like wings? The car will carry a lot of dust when it passes by. Why should we stand outside the white safety line when waiting at the train station?