Three ReasonsTeacher: Stone, give me three reasons why you know the Earth to be round. Stone: Ma says so, Pa says so, and you say so!三条理由老师:斯通,说出三条理由来证明地球是圆的。 斯通:妈妈是这么说的,爸爸是这么说的,你也是这么说的。
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