学会控制卡路里

最近，研究人员注意到一个看起来很奇怪的趋势：根据许多全国性的调查，尽管美国过度肥胖人口的比例上升了，但脂肪在一般美国人的饮食中所占的比例竟然减少了。这种现象被称做是“美国怪现象”。

Learn How to Contrd the Calorie Crunch

Researchers have recently noticed what seems to be a curious trend： According to a number of national surveys, the proportion of fat in the average American diet has actually gone down, even as rates of obesity havegone up. This has come to be called the ＂American paradox.＂