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单词 微量元素
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〔microelement〕A trace element.痕量元素,微量元素〔molybdenum〕A hard, silvery-white metallic element used to toughen alloy steels and soften tungsten alloy. An essential trace element in plant nutrition, it is used in fertilizers, dyes, enamels, and reagents. Atomic number 42; atomic weight 95.94; melting point 2,617°C; boiling point 4,612°C; specific gravity 10.22 (at 20°C); valence 2, 3, 4, 5. See table at element 钼:一种银白色硬金属元素,用于加硬钢合金和软化钨合金。它是植物营养必要的一种微量元素,用于肥料、染料、搪瓷和试剂。原子序数42;原子量95.94;熔点2,617°C;沸点4,612°C;比重10.22(20°C时);化合价为2,3,4,5 参见 element〔orthomolecular〕Of, relating to, or being a theory holding that mental diseases or abnormalities result from various chemical imbalances or deficiencies and can be cured by restoring proper levels of chemical substances, such as vitamins and minerals, in the body.正分子的:属于、关于或成为正分子理论的,这种理论主张精神疾病或不正常是由各种化学物质失衡或缺少而引起的,可通过在身体内恢复以适量的化学物质(如维生素和微量元素)而治愈
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