| 单词 | 自然产生 |
| 释义 | 〔spontaneous〕Happening or arising without apparent external cause; self-generated.自然产生的：非由显然的外力诱发或产生的；自我生成的〔bitumen〕Any of various flammable mixtures of hydrocarbons and other substances, occurring naturally or obtained by distillation from coal or petroleum, that are a component of asphalt and tar and are used for surfacing roads and for waterproofing.沥青，柏油：一种碳氢化合物和其他物质的易燃混合物，自然产生或通过蒸馏煤或石油而获得，是沥青和焦油的混合物，用于铺路和防水〔pyrophyllite〕A silvery white or pale green aluminum silicate mineral, Al2Si 4O 10(OH) 2, occurring naturally in soft, compact masses. 叶腊石：一种银白色或浅绿色的铝硅酸盐矿石，Al2Si 4O 10(OH) 2，在松软紧密的矿堆中自然产生 〔radioelement〕A naturally occurring or artificially produced radioactive element.放射性元素：自然产生或人为制造的放射性元素〔accrue〕To come to one as a gain, an addition, or an increment:自然增长，自然产生：因获得、附加或增加而成为一体：〔cortisone〕A naturally occurring corticosteroid, C21H 28O 5, that functions primarily in carbohydrate metabolism and is used in the treatment of rheumatoid arthritis, adrenal insufficiency, certain allergies, and gout. 皮质酮：一种自然产生的类皮质激素，C21H 28O 5，主要作用于碳水化合物的新陈代谢并用于风湿性关节炎、肾上腺不足、某些过敏症和痛风的治疗 〔freemasonry〕Spontaneous fellowship and sympathy among a number of people.本能的同情：一群人自然产生的友谊和同情〔firedamp〕A combustible gas, chiefly methane, occurring naturally in mines from the decomposition of coal.沼气：一种在矿坑里由煤腐烂而自然产生的可燃气体，主要成分是甲烷 |
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