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有种动物名叫大蜂(即马蜂),它翅膀弱小,身体却很重。根据空气动力学,它是不能飞行的。可大蜂并不知道这些,因此,它飞起来了。
A kind of animal named big bee (ie, wasp), its wings are weak, the body is very heavy. According to aerodynamics, it can not fly. Big bees do not know these, so it flies up.