| 单词 | 很亮 |
| 释义 | 〔magnesium〕A light, silvery-white, moderately hard metallic element that in ribbon or powder form burns with a brilliant white flame. It is used in structural alloys, pyrotechnics, flash photography, and incendiary bombs. Atomic number 12; atomic weight 24.312; melting point 649°C; boiling point 1,090°C; specific gravity 1.74 (at 20°C); valence 2. See table at element 镁：一种质轻、银白色的成条状或粉状的中性硬度金属元素，燃烧时有很亮的白色火焰。用于建筑方面的合金、焰火、闪光灯或燃烧弹。原子序号12；原子量24.312；熔点649°C；沸点1,090°C；比重1.74(20°C时）；原子价2 参见 element〔jet〕A dense black coal that takes a high polish and is used for jewelry.黑玉，贝褐炭：一种用作宝石的很亮的深黑色碳物质 |
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