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释义 | 〔lead〕Symbol Pb A soft, malleable, ductile, bluish-white, dense metallic element, extracted chiefly from galena and used in containers and pipes for corrosives, solder and type metal, bullets, radiation shielding, paints, and antiknock compounds. Atomic number 82; atomic weight 207.19; melting point 327.5°C; boiling point 1,744°C; specific gravity 11.35; valence 2, 4. See table at element 符号 Pb 铅:一种柔软、有延展性和可锻性的,蓝白色高密度金属元素,主要从方铅矿中提取,用于集装箱、耐腐蚀管道、焊料和字铅、子弹、放射性防护屏、涂料及抗爆化合物。原子序数82;原子量207.19;熔点327.5°C;沸点1,744°C;比重11.35;化合价2或4 参见 element〔DVD〕A high-density compact disk for storing large amounts of data, especially high-resolution audio-visual material.多功能激光视盘:可储存大量数据的高密度光盘,尤使用于高质量影音作品上〔apolipoprotein〕Any of various proteins that combine with a lipid to form a lipoprotein and are a constituent of chylomicrons, HDL, LDL, and VLDL.阿朴脂蛋白,藻胆色素蛋白:同脂质结合形成脂蛋白的各种蛋白质,是乳糜微粒、高密度脂蛋白、低密度脂蛋白和超低密度脂蛋白的成分 |
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