同根派生 methylene group相关词英汉例句The carbide reacts with hydrogen on the surface to give a methylene.碳化物与氢在表面反应产生亚甲基。Kodak company describes open chain reactive methylene two-equivalent yellow-forming conplers.柯达叙述了一种直链的活性亚甲基两当量的黄成色剂。methylene group更多例句