second language

音标发音

This is an especially good translation for people who speak English as a second language.
對英語作爲第二語言的人講，這是一個尤其好的譯本。
Well over half our audiences have English as a second language, and on some services the proportion is as high as 80%.
我們有一大半受衆把英語作爲第二語言，而對某些市場而言，這個比例高達80%。
English is the city’s second language, closely followed by Russian and Turkish.
英語是這座城市的第二語言，緊接著是俄語和土耳其語。

Through the implant process,called Intra-cranial Electrophysiology,or ICE, the researchers have found that Broca's area processes three different language functions in succession within a quarter of a second.
It turns out that if you start learning a language, a second language is where most of the work's been done, within the first few years of life you're fine.
如果你在出生的頭幾年裡開始學習一門語言,非常努力地學習了第二門語言,那麽你一切正常
耶魯公開課 - 心理學導論課程節選
What do you think is the most important thing to teach students who learn English as a second language?
你覺得要教那些以英語爲第二語言的學生，最重要的是什麽？
教英語 - SpeakingMax英語口語達人

The group found that many students received minimal or no help in developing their second language.
NPR: Instruction Of Students Learning English Bleak

a language that a person can speak that is not the first language they learned naturally as a child

Someone's second language is a language which is not their native language but which they use at work or at school.

第二語言
English is neither our mother tongue nor second language.
英語不是我們的母語,也不是第二語言。
心理學
第二語言