noun🔗Share蛋白石，欧泊。 A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO2·nH2O."The geologist carefully examined the opal, noting its beautiful colours but also its softer texture compared to the quartz crystals. "地质学家仔细检查了那块蛋白石，注意到它美丽的色彩，但也留意到它与石英晶体相比，质地要软一些。mineralgeologymaterialsubstanceChat with AIVocabulary GamePractice Reading
noun🔗Share蛋白石终止密码子，UGA密码子. A colloquial name used in molecular biology referring to a particular stop codon sequence, "UGA.""In her molecular biology class, Sarah learned that "opal" is another name for the UGA stop codon, which signals the end of protein synthesis. "在萨拉的分子生物学课上，她学到“蛋白石”（opal）是UGA终止密码子的一个别称，它发出信号，表示蛋白质合成的结束。biologybiochemistryChat with AIVocabulary GamePractice Reading
noun🔗Share奥帕尔灰蝶，猫眼灰蝶 Any of various lycaenid butterflies of the genus Nesolycaena."While hiking in the rainforest, the butterfly enthusiast excitedly pointed out an opal flitting among the ferns. "在热带雨林徒步时，那位蝴蝶爱好者兴奋地指着一只在蕨类植物间飞舞的奥帕尔灰蝶。animalinsectbiologynatureChat with AIVocabulary GamePractice Reading
