It's long been known that people claim to eat far less than they really do. Some studies suggest people underreport their caloric intake by 30 percent or more.

众所知，人们实际上宣称食物消耗量要远远少于自真正消耗份量。某些研究也表明：人们实际上吸路里比他们认为要多出30％或者更多。