我们想跟孩子们一起制作硫酸铜晶体。We tried to grow some copper sulphate crystals with our children.硫酸铜具有防腐性,这是不曾有过问题的.The antiseptic properties of copper sulphate have never been questioned.铁或钢放入硫酸铜中,也会生成疏松的浸镀层.Iron or steel placed in co...
Their healthy image disguises the fact that they are highly processed foods.它们看上去有益健康，实则掩盖了其为精加工食品这一事实。The King took a fancy to ordering disguises and masks.国王迷上了订购化装用品和面具。She's adopted so many disguises her own mot...