Intake of the high calorie liquid was similar whether it was high or low effort to get.

而摄入高热量液体的时候，不论付出多少，摄入量都差不多。

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The study participants ate some 441 fewer calories a day when they followed this high-protein diet and regulated their own calorie intake.

按这种高蛋白饮食来调节他们的能量摄入，跟踪调查发现他们每天摄入的卡路里比原来减少了441卡。

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Burdock is well recognized as a health food because it has low calorie content and a high fiber intake.

牛蒡是公认的健康食品，因为它的内容和低热量高纤维的摄入量。

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They added that since the completion of the Aswan High Dam, Egypt's population had doubled, calorie intake and meat consumption had risen by more than a third, and the use of fertilisers had increased four-fold.

BBC: Egyptian farmers (Getty Images)

The calorie intake of the opportunistic hunter-gatherers was more than twice as high as that of the subsistence farmers who replaced them.

ECONOMIST: Food in history