| 单词 | 自然存在 |
| 释义 | 〔skatole〕A white crystalline organic compound, C9H 9N, having a strong fecal odor, found naturally in feces, beets, and coal tar and used as a fixative in the manufacture of perfume. 粪臭素：一种白色结晶有机化合物，C9H 9N，有强烈臭味，自然存在于粪便、甜菜根和煤焦油中，作为生产香料的固定剂 〔ontology〕The branch of metaphysics that deals with the nature of being.本体论：对自然存在的研究，属于形而上学理论的分支〔dextrose〕The dextrorotatory form of glucose, C6H 12O 6·H 2O, found naturally in animal and plant tissue and derived synthetically from starch. Also called dextroglucose 右旋糖：葡萄糖的右旋形式，C6H 12O 6·H 2O，在动、植物组织中自然存在并可由淀粉人工合成 也作 dextroglucose〔fieldstone〕A stone occurring naturally in fields, often used as a building material.粗石：在田野里自然存在的石头，通常用来作建筑材料〔riboflavin〕An orange-yellow crystalline compound, C17H 20N 4O 6, the principal growth-promoting factor in the vitamin B complex, naturally occurring in milk, leafy vegetables, fresh meat, and egg yolks. Also called lactoflavin ,vitamin B 2 核黄素：一种桔黄色结晶化合物，C17H 20N 4O 6，在复合维生素B中的主要促进成长的因素，自然存在于牛奶、有叶蔬菜、鲜肉及蛋黄中维生素 也作 lactoflavin,vitamin B2 〔antiangiogenic〕Of or relating to a naturally occurring substance, drug, or other compound that can destroy or interfere with the fine network of blood vessels needed by tumors to grow and metastasize.抗血管增生的：自然存在的物质、药剂或其它化合物的、或与其相关的，能够破坏或阻碍肿瘤生长和转移所必须的细微血管网〔lysozyme〕An enzyme occurring naturally in egg white, human tears, saliva, and other body fluids, capable of destroying the cell walls of certain bacteria and thereby acting as a mild antiseptic.溶菌酶：一种自然存在于蛋白、人的眼泪、唾液或其它体液之中的酶，能够毁坏某些细菌的细胞壁，从而可以用作温和的抗菌剂〔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〔angiostatin〕A naturally occurring protein that is a specific inhibitor of endothelial proliferation and a potent angiogenesis inhibitor. It is under investigation as a potential cancer therapy.血管增生抑制素：自然存在的蛋白质，是专用于抑制内皮增生的药剂和有效的血管生成抑制剂。目前正进行将它用于癌症治疗的研究〔phenylethylamine〕An amine, C8H 11N, that has pharmacological properties similar to those of amphetamine, occurs naturally as a neurotransmitter in the brain, and is present in chocolate and oil of bitter almonds. 苯基乙胺，苯氨基丙酸：药理特性类似于安非他命的胺，C8H 11N，是自然存在于大脑中的神经传导素，也见于巧克力和苦杏仁油中 〔biopiracy〕The commercial development of naturally occurring biological materials, such as plant substances or genetic cell lines, by a technologically advanced country or organization without fair compensation to the peoples or nations in whose territory the materials were originally discovered.生物掠夺：拥有先进科技的国家或组织对自然存在的生物原料（如植物物质或遗传细胞链）进行的商业开发，却未对这些原料最初发现地区的民族或国家给予合理补偿〔spirit〕A supernatural being, as:超自然存在，如： |
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