"Since the dawn of man" is really not that long.

“自从人类出现”其实并非那么久远。

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Seven years are not that long a period, yet, much must have changed since then.

七年并不是那么长的一段时间，但自那以后，很多东西肯定都已经变了。

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It's not that long ago that 300 British forces personnel had died in Afghanistan.

就在不是很久以前，300名英军士兵在阿富汗阵亡。

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For the best results, carrots should be grown in sandy soil that does not hold water for a long time.

VOA: special.2009.02.24

It was basically built not that long ago.

它建成的时间不长。

现代化的地方 - SpeakingMax英语口语达人

I think a lot of people, especially the Chinese leaders, the decision-makers, realized that that's not going to last very long.

许多中国人，尤其是领导人，决策者们，意识到这不能持续很久。

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

"Not that long because I'm feeling good, working hard and geting ready, " Pineda said.

WSJ: Pineda's SUV window broken by homer

We heard it not that long ago in the big cities of this country.

CNN: Rural America has a teen pregnancy problem

Not that long ago, most cities considered the solution to pollution to be dilution.

CNN: Polluted rivers stain Portland's image