And African presidents from Rwanda, Ghana and Sierra Leone each pointed to the negative impact of the global financial and food crises, as well as the growing impact of climate change, on development in their countries.

VOA: standard.2009.09.24

Well it could go twenty basis points lower but interest rates can never be negative.

呃，它可以再跌二十个基本点,但是利率永远不能是负值。

耶鲁公开课 - 金融市场课程节选

Well we know stock prices are never negative.

我们知道股价是不会是负值的。

麻省理工公开课 - 计算机科学及编程导论课程节选

The Trans fats that we mentioned before that you can see listed over here from margarine, shortenings, deep fried foods, a lot of fast foods and baked goods have a negative impact on health as well.

之前提过的反式脂肪,你可以在人造黄油,起酥油,油炸食品以及很多快餐和烘烤食品中找到,它对身体也很不好

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选