同根派生 英汉例句Atolls and coral reefs from the stony coral skeleton form.環狀珊瑚島和珊瑚礁由石珊瑚的骨骼形成。When talking about corals, people normally refer to stony corals that build fascinating reefs.每儅提及珊瑚，我們便會聯想到那些能建造珊瑚礁的石珊瑚。