作为开发人员，必须权衡在同一应用程序中使用多种语言的优点和缺点。

As a developer, you must weigh the pros and cons of having multiple languages in your application.

youdao

获取一种新的语言能力且在日后的生活中使用多种语言的能力并没有年龄上限。

There is no upper age limit for acquiring a new language and then continuing one's life with two or more languages.

youdao

在一些使用多种语言的国家，英语经常作为官方语言帮助人们交流。

In countries where many different languages are spoken, English is often used as an official language to help people communicate.

youdao

Where there are many languages in use, language comes to seem arbitrary rather than natural, ; as the product of convention; not as something you're simply born into but something that you learn, something that is made and that can be remade.

世界上有很多种语言在使用中，然而语言的运用却显得任意，而非自然而然的作为传统的产物;,不像是与生俱来的才能，而像后天学会的，像是某些创造再创造的事物。

耶鲁公开课 - 现代诗歌课程节选