学会说好一种语言需要花很长的时间。

It takes a long time to learn to speak a language well.

《牛津词典》

十年真是一段很长的时间，玛丽想。

Ten years was a long time, Mary thought.

youdao

十年是一段很长的时间。

Ten years is a long time.

youdao

It is also pretty clear that for some after the foundation of the polis, there were no city walls.

而且很明显,在城邦建立起来之后的相当长的一段时间内,都没有城墙

耶鲁公开课 - 古希腊历史简介课程节选

you could maybe be speaking with a friend who talks about his long work hours and you are very surprised,

在你跟一个朋友聊天时，他谈起自己很长的工作时间，而你感到非常惊讶，

Do you ever课堂 - SpeakingMax英语口语达人

By the time Bush asked me to be his WHCF in early 2006, I had already long experience working for the president.

当布什让我做办公室主任时,也就是2006年初，我已经有很长的时间,和他一起工作了。

普林斯顿公开课 - 国际座谈会课程节选