He remained silent for some time.

他好长时间都保持沉默。

《柯林斯英汉双解大词典》

Unemployment will go on rising for some time yet.

失业人数还会继续增长一段时间。

《柯林斯英汉双解大词典》

Her popularity has been on the wane for some time.

她的人气一段时间以来江河日下。

《牛津词典》

The Federal Reserve suggested again that short-term interest rates are likely to remain near zero for some time.

VOA: special.2009.01.31

Well a number of you have spent this past week playing with this particular tool which is a project the course has been working on for some time in an effort to make it easier and more social to actually shop for courses.

在过去的一周里,已经有一部分人开始使用这种特殊的工具了,这门课程一直在致力于这一工具的开发,目的是为了让课程变的更简单,选课更人性化。

哈佛公开课 - 计算机科学课程节选

For example, let's pretend that you are speaking with a friend who had been studying for a test for some time.

例如，我们假设你跟一位朋友在聊天，他已经为一门考试复习了好一段时间。

I'm sure 课堂 - SpeakingMax英语口语达人

Investors have been betting for some time that the worst is over for China.

FORBES: Recovery In China? Not So Fast

Really, it's only the peace and order problem that has troubled us for some time.

CNN: INTERVIEW

This was a story that had been circulating around the Internet for some time.

FORBES: The Power Of Drudge: A Little Civics Lesson For Janet Napolitano And Barack Obama