一提起冶炼金属,人们往往会想到高炉、平炉、转炉等庞然大物。然而科学家告诉我们,有的“冶炼厂”也可以建立在植物和动物身上。新喀里多尼亚岛是法国在大洋洲西南部的一个岛屿,岛上生长着一种奇怪的树。这种树能分泌出一种蓝色乳液,因此岛上的居民称它为“蓝液树”。有人对蓝色乳液进行了化学研究,发现其中含有大量的金属镍。通过加工烘干之后,金属镍的含量占到总重量的25%。这些蓝液树中怎么会含有 Mention of smelting metal, people often think of blast furnace, hearth, converter and other monsters. However, scientists tell us that some “smelters” can also be built on plants and animals. New Caledonia is an island of French south-west Oceania, on which a weird tree grows. The tree secrete a blue lotion, so residents on the island call it “blue-liquid tree.” Someone made a chemical study of the blue lotion and found that it contains a lot of metallic nickel. After processing and drying, the content of nickel metal accounts for 25% of the total weight. How these blue liquid trees will contain