methylene的意思？

methylene的音标：methylene的英式发音音标为：['meθɪli:n]methylene的美式发音音标为：['meθəlin]...

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.The reactor and transfer line are rinsed with several small portions of methylene chloride.反应器和输送管线...