Zinc sulfate heptahydrate (1:1:7);sulfuric acid, zinc salt (1:1), heptahydrate;white vitriol (heptahydrate) ...是什么意思_Zinc sulfate heptahydrate (1:1:7);sulfuric acid, zinc salt (1:1), heptahydrate;white vitriol (heptahydrate) ...在线翻译_英语_读音_用法_例句