另一种说法是，这种颜色可能与冰中含有的大量金属化合物有关，包括铜和铁。
Another suggestion is that the color might be related to ice with high levels of metallic compounds, including copper and iron.
铜和铁使用最为普遍，因其坚固且易于塑形。
Copper and iron were most commonly used as both are tough and easily shaped.
并和蒸馏水中的锌、铜和铁的含量进行了比较。
The contents of zinc, copper and iron in aerated water are compared with those in the running water.
应用推荐