ethanediylideneethanetetrayl联: unite; join甲基: methyl; methylium; carbinyl; ...桥联亚甲基；内亚甲基: endo-methylene group亚甲基: methene methylene; methylene group联亚甲苯基二异氰酸酯: ditolylene diisocyanate下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:联亚甲基，即可在微信中查询翻译
