noun 下载 🔗分享 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. Examples : "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。 mineral geology material substance 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 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." Examples : "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。 biology biochemistry 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 奥帕尔灰蝶,猫眼灰蝶 Any of various lycaenid butterflies of the genus Nesolycaena. Examples : "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。 animal insect biology nature 与AI对话词汇游戏阅读练习