"Try sticking a walnut in your mouth and then biting on it. It's not so easy," Strait says.

“尝试把一颗核桃塞进嘴里，然后咬一咬。咬碎没那么容易，”斯特雷特说。

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And that, says Strait, suggests that simplistic ideas about australopithecine diets, based on tooth and jaw size, and why they went extinct, need to be reevaluated.

斯特雷特还说，根据牙齿和颚的大小提出的关于南方古猿日常饮食以及它们为什么灭绝的过分简单的想法需要重新评估。

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And that, says Strait, suggests that simplistic ideas about australopithecine diets, based on tooth and jaw size, and why they went extinct, need to be reevaluated.

斯特雷特还说，根据牙齿和颚的大小提出的关于南方古猿日常饮食以及它们为什么灭绝的过分简单的想法需要重新评估。

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