Almost sixty percent of the world's freshwater withdrawals from rivers, lakes and other water resources go toward irrigating fields.

VOA: special.2009.03.23

But then developments in other fields can change the relative prices and suddenly make an idea that had been hypothetical and unapplied suddenly work well.

而其他领域的发展,改变了相对价格,过去那些看似空想,而且不切实际的主意,就突然间变得可行了

耶鲁公开课 - 金融市场课程节选

He worked in the fields to show farmers new ways to grow wheat, rice and other crops.

VOA: special.2009.09.22

According to the USA Today newspaper, the Obama Administration estimates that opportunities in energy and environmental occupations will grow by 52 percent by 2016 - compared to just a 14-percent increase in other fields.

VOA: standard.2010.04.22