Miller examined this difficult period in American history by setting his play at another difficult time.

VOA: special.2009.11.29

Internet industry was in a very difficult time at that time, at that period, and we gradually realized that this company cannot really survive if we stick with the backend technology providers thing.

当时互联网行业正处于困境，如果坚持做后台搜索技术提供商,这个公司将无法生存。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

The national security challenge comes at a difficult time for Mr.Obama, who later this month will mark his first year in office.

VOA: standard.2010.01.06

"This is at a time when we are working to relaunch negotiations and we believe that these actions make it more difficult for our efforts to succeed.

VOA: standard.2009.11.17