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.

众所周知，们实际的食物消耗量要远远少于自真正消耗的份量。某些研究也：们实际吸收的卡路里比他们认为的要多出30％或者更多。