"Because we asked, and other parties asked, three years ago three and a half years ago for the setting up of the Iraq Inquiry."

VOA: standard.2010.01.22

This Cambridge History of Food talks about three separate primary phases in human food evolution: one beginning a million and a half years ago, another about 700,000 years ago, and then the 10,000 year ago one that I talked about just a moment ago.

剑桥饮食史》描述了,人类饮食结构演化过程中的三个不同阶段,其一,始于一百五十万年前,其二,距今约七十万年,其三,距今一万年,我们刚讨论过了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The three-and-a-half percent growth was the first expansion in more than a year, and the strongest in two years.

VOA: special.2009.10.30

They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.

VOA: special.2009.09.08