| 单词 | 组成物 |
| 释义 | 〔calcium〕A silvery, moderately hard metallic element that constitutes approximately 3 percent of the earth's crust and is a basic component of most animals and plants. It occurs naturally in limestone, gypsum, and fluorite, and its compounds are used to make plaster, quicklime, Portland cement, and metallurgic and electronic materials. Atomic number 20; atomic weight 40.08; melting point 842 to 848°C; boiling point 1,487°C; specific gravity 1.55; valence 2. See table at element 钙：一种银色的、硬度适中的金属元素，约占地壳中各种元素的百分之三，是多数动物和植物的基本组成物之一。自然存在于石灰石、石膏、氟石以及其它化合物之中，用于制造石膏、生石灰、硅酸盐水泥以及冶金和电子材料。原子序数20；原子量40.08；熔点842到848度；沸点1,487度；比重1.55；化学价2 参见 element〔lignin〕A complex polymer, the chief noncarbohydrate constituent of wood, that binds to cellulose fibers and hardens and strengthens the cell walls of plants.木质素：一种复杂聚合物，是木头非碳水化合物的主要组成物，作用是凝聚纤维素并增强细胞壁的强度〔rope〕A sticky glutinous formation of stringy matter in a liquid.丝状黏质，黏丝：液体中丝状物质的胶粘的组成物〔trace〕A constituent, such as a chemical compound or element, present in quantities less than a standard limit.痕量：比标准限度数量小的一种组成物，如化学化合物或元素〔rosette〕A roselike marking or formation, such as one of the clusters of spots on a leopard's fur.花号，星号：如豹子皮上的斑点族等形如玫瑰花的标志或组成物〔synthetic〕Greek sunthetikos [skilled in putting together, component] 希腊语 sunthetikos [非常熟练地放在一起的，组成物] |
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