n.a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
opal 相关例句
双语例句
用作名词(n.)
Opals are milky gems. 蛋白石是乳白色的宝石。
It was a round opal, red and fiery, set in a circle of tiny rubies. 那是一块圆形蛋白石，红红的，象火焰一般，上面镶着一圈红宝石。
权威例句
The OPAL CollaborationUpdated Opal OpacitiesTunable Inverse Opal Hydrogel pH SensorsOPAL Equation-of-State Tables for Astrophysical ApplicationsThe barite-opal-organic carbon association in oceanic particulate matterFabrication of High-Quality Opal Films with Controllable ThicknessUnique pathway of expression of an opal suppressor phosphoserine tRNAHigh efficiency of CdSe quantum-dot-sensitized TiO2 inverse opal solar cellsA simple method for the rapid determination of biogenic opal in pelagic marine sedimentsA review of the Si cycle in the modern ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproduct...
