Indole is extracted from methylnaphthalene oil through solvent extracting.用溶剂萃取法从甲基萘油中萃取吲哚.Tryptanthrin is a kind of indole quinazoline alkaloid.色胺酮属吲哚喹唑啉类生物碱.Indole consists in washing oil of coal tar.煤焦油洗油(以下简称洗油)中含有吲哚...
西班牙的当务之急是签署《欧洲经济和货币联盟条约》。Spain's top priority is the signing of an EMU treaty.两国的外交大臣今天签署了文件。The foreign ministers of the two countries signed the documents today.两国将签署互不侵犯条约。A non-aggression pact will be signed bet...