Congress will take its annual long recess in August, and Democrats hope to use the time to build support for health-care reform around the country.

VOA: standard.2009.07.31

Research on subjective wellbeing-- the term that psychologists use to capture happiness essentially has been going on for very, very long time.

对幸福的研究-,心理学家用这个词来描述快乐,已经进行了很多年。

哈佛公开课 - 幸福课课程节选

How long" is going to be such a useful pattern for you to use.

How long”是个特别有用的句型。

How long课堂 - SpeakingMax英语口语达人

I'm going to give you examples now for how to use "How long."

下面我们来看几个例子，看看该怎么使用 “How long”。

How long课堂 - SpeakingMax英语口语达人