基本解释n.凝灰岩同根派生 英汉例句用作名词 (n.)The light-colored tuff can be used to produce cement.淡色凝灰岩可以用来制造水泥。This kind of rock is called tuff.这里的岩质是凝灰岩。英英字典剑桥英英字典 a way of writing tough