It either came from calcium supplements or was hidden in foods like frozen chocolate desserts containing milk proteins, fats and minerals (as opposed to whole milk).
它要么来自钙补充剂或者包含在食物中，如含有牛奶蛋白质的冷冻巧克力甜点，脂肪和矿物质。
Fish, vegetables and milk contain most of the minerals we need.vitamins are found in fresh vegetables and fruit.
鱼类、蔬菜和牛奶中包含我们所需的大部分矿物质。维他命可以在新鲜的蔬菜和水果中获得。
The purity of minerals is often assessed in this way, as are things like the amount of fat in milk or salt in water.
估定矿物质的纯度就常常用这种办法。
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