Many indigenous people in Peru speak Quechua as their first language.

秘鲁的许多土著人把克丘亚语作为他们的第一语言。

The first language of Sweden is Swedish.

瑞典的第一语言是瑞典语。

Here, Russian has become the first language.

这里，俄语已经成为第一语言。

French did not replace English as the first language.

法语却没有取代英语而成为英国的第一语言。

For many, Welsh is their first language and it's growing as a second language.

对许多人来说，威尔士语是其第一语言，现在把它作为第二语言的人正在增加。

(Learn the Second language by Using the First Language), in Zhang Dexing and Li Xiaoqi, eds.

运用第一语言来学习第二语言。

Speakers of English as a second language will soon outnumber those who speak it as a first language.

发言者的英语作为第二语言将很快多于那些谁讲它作为第一语言。

It shows that in the order of acquiring language vocabulary, there is a difference between the first language and the second language acquisition.

认为在词汇习得顺序方面，第一语言的词汇习得顺序与第二语言的词汇习得顺序有所不同；

Only about six percent of the world speak English as a first language.

仅有世界的百分之六左右把英语作为第一语言.

In the late fourteenth century, English became the first language again.

在14世纪末，英语再次成为第一语言。