| 单词 | 不透光 |
| 释义 | 〔radioscopy〕Examination of the inner structure of optically opaque objects by x-rays or other penetrating radiation; radiology.放射检验：用X射线或其它穿透性的辐射对不透光的物体的内部构造进行的检查；放射学〔lightproof〕film stored in lightproof containers.装在不透光盒的胶片〔density〕The degree of optical opacity of a medium or material, as of a photographic negative.不透光度：一定介质或材料（例如照相感光纸）的不透光程度〔rhenium〕A rare, dense, silvery-white metallic element with a very high melting point used for electrical contacts and with tungsten for high-temperature thermocouples. Atomic number 75; atomic weight 186.2; melting point 3,180°C; boiling point 5,627°C; specific gravity 21.02; valence 1, 2, 3, 4, 5, 6, 7. See table at element 铼：一种稀有的不透光银白色金属元素，具有非常高的熔点。用作电气触点，与钨用作高温热电偶。原子序数75；原子重量186.2；熔点3,180°C；沸点5,627°C；比重21.02；化合价1，2，3，4，5，6，7 参见 element〔opaque〕Impenetrable by light; neither transparent nor translucent.不透光的：不能被光线穿透的；既不透明也不是半透明的〔dense〕Permitting little light to pass through, because of compactness of matter:不透光的：由于物质致密而几乎不允许光透过： |
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