Some researchers see the australopithecine mouth as sculpted for munching small, hard objects such as seeds.

一些研究人员把南方古猿的嘴看作是用力咀嚼如种子一样小而硬的食物的造型.

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The great , brainy apes , including man, arrived in the last 20 million years.

而聪明的古猿,包括早期人类, 在最近两千万年出现.

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Some Australopithecus molars show no trace of microscopic cracks that hard foods should create.

一些南方古猿的磨牙看不出坚硬的食物会留下的显微裂缝的痕迹.

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