买下天空卖出天空告诉天空

There's a problem, feathers iron有个问题，羽毛是铁质的Bargain buildings, weights and pullyes在建筑，重量和轮轴上讨价还价Feathers hit the ground before the weight can leave the air在它的重量可以承担之前，羽毛撞击地面Buy the sky and sell the sky and tell th . . . 阅读详情