the four yānas or vehicles idem四: four衍: spread out; develop; amplify四氧二化铌: columbium tetroxide四眼仔: mummy dearest四氧化二氮: dinitrogen tetraoxide; dinitrogen tetroxide (n2o4); nitrogen dioxide; nitrogen tetroxide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:四衍，即可在微信中查询翻译
