Interest rates have hit zero 0.2%; that's twenty basis points above zero.

利率已经接近零了0。2%；,这只有零点以上的二十个基本点。

耶鲁公开课 - 金融市场课程节选

So this is the percent error and what you see here is that if the number is below the zero line it means people underestimated the calories, and the bars that go above means people overestimated the calories.

这是百分比误差,你们看,如果数字低于零,这表示人们低估了卡路里,高于零表示人们高估了卡路里

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选