对于这种饮食产生的原因是，旧石器时代人类通过自然选择已经适应了那个时代的食物。
The rationale for this is that natural selection has adapted Paleolithic humans to the food in that era.
也称为史前穴居人饮食，旧石器时代的营养饮食计划是以约250万年前的人类物种饮食为基础的：包括鱼类，动物，植物。
Also called the caveman diet, the Paleolithic diet is a nurtritional plan based on what human species ate about 2.5 million years ago: fish, animals, plants.
“原始人饮食法”主要是采用旧石器时代的人类所使用的食材。
The paleolithic diet (also called the paleo diet, caveman diet or stone-age diet) is based mainly on foods presumed to be available to paleolithic humans.
“原始人饮食法”主要是采用旧石器时代的人类所使用的食材。
The paleolithic diet (also called the paleo diet, caveman diet or stone-age diet) is based mainly on foods presumed to be available to paleolithic humans.
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