: a light-colored volcanic tuff resembling pozzolana in composition and occurring especially on the lower Rhine where it is ground for use in a hydraulic cement
Word History
Etymology
Dutch trass, terras, from French terrasse pile of earth, terrace, from Middle French
Mr. Ng 不推薦使用 Google翻譯 ^_^: Translate no To zh-TW trass --------- 蔑視