noun🔗Share菊石，菊石化石。 Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal."While hiking, we found a beautiful, spiral-shaped ammonite embedded in a rock, a reminder of ancient sea creatures. "徒步旅行时，我们在一块岩石中发现了一个漂亮的螺旋状菊石化石，它让我们想起了古老的海底生物。geologyanimalarchaeologybiologypastChat with AIVocabulary GamePractice Reading
noun🔗Share铵油炸药，硝铵炸药。 An explosive prepared from a mixture of TNT and ammonium nitrate; a form of amatol, popular in Eastern Europe and China."The demolition crew used ammonite to break up the old building. "爆破队使用铵油炸药来拆除旧楼。compoundsubstancematerialchemistryweaponmilitaryscienceChat with AIVocabulary GamePractice Reading
