Previously humans were to be vegetarian: Genesis 1, the portrait was one in which humans and animals did not compete for food, or consume one another.

在《创世纪》1中，早期的人类是素食主义者，描绘了一幅人类和动物,不用争夺食物，不用互相残杀的景象。

耶鲁公开课 - 旧约导论课程节选

If the food environment had evolved very slowly, as it had in earlier human history, the body would have a chance to adapt.

如果食品环境演化很缓慢,像它在人类早期历史时那样,机体就有机会去适应这样的食品环境

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

There may be uncertainties of that nature but certainly not the uncertainties of early humans.

也许还有其他的不确定因素,但这绝不等同于早期人类的不确定因素

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Food has changed in a lot of ways from the early ancestral days.

自人类早期起,食品在各方面发生变化

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选