| 单词 | 铝土岩 |
| 释义 | 〔gallium〕A rare metallic element that is liquid near room temperature, expands on solidifying, and is found as a trace element in coal, bauxite, and other minerals. It is used in semiconductor technology and as a component of various low-melting alloys. Atomic number 31; atomic weight 69.72; melting point 29.78°C; boiling point 2,403°C; specific gravity 5.907; valence 2, 3. See table at element 镐：一种在室温下是液体的稀有金属元素膨胀成固化，通常作为煤、铝土岩和其它矿中的微量元素而存在。用于半导体技术和各种低融合金的合成。原子序数31；原子量69.72；熔点27.98摄氏度；沸点2,403摄氏度；比重5.907；化合价2，3 参见 element |
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