必须: must; have to; be obliged to ...大量: a large number; a great quan ...听: hear; listen语言: language一年的学习后就掌握了这种语言: mastered the language in a year's study多种语言: multilingual; polyglot多种语言的: multilingual多种语言者: multilingual各种语言: eg. a diversity of languages讲某种语言: speaking a certain language两种语言: bilingualism; diglossia; diglossic两种语言的: bilingual; macaronic哪种语言: what language人种语言学: ethnolinguistics三种语言: the three languages数种语言: polyglot说(某种语言): speak爱的五种语言: the five love languages多种语言播送: multilingual transmission多种语言地区: multilingual areas多种语言票据: multilingual note多种语言支持: multilingual support讲同一种语言: share a common tongue能说多种语言: additional language skills能说两种语言: diglot