学生们应该掌握一门第二语言。

Students are expected to master a second language.

《柯林斯英汉双解大词典》

我慢慢开始掌握这种语言。

I'm slowly getting to grips with the language.

《牛津词典》

在现代社会，掌握第二语言是值得的。

It is worth mastering a second language in modern society.

youdao

The point that was just raised here is I had said before that everybody who's neurologically normal comes to acquire and learn a language.

我这里向表达的关键是,我之前说过所有神经上正常的人,都会掌握和习得一种语言

耶鲁公开课 - 心理学导论课程节选

So it was like a big shock to me because after five years, I thought I know the language.

所以，这对我来说，就是一个很大的打击，因为五年的学习以后，我以为我掌握这门语言了。

语法和语调是关键 - SpeakingMax英语口语达人

Now, many autistic children have no language; they're totally shut off from society.

许多孤独症儿童未能掌握语言,他们和社会是完全隔绝的

耶鲁公开课 - 心理学导论课程节选