纪录片《熟食造就了人类吗》 第17期：不同时期的人类牙齿

This is the more recent human ancestor.

这是出现得晚一点的人类祖先

Its teeth are smaller, they're crustier,

它的牙齿小一些 却更坚硬

and the enamel¹ is thinner.

釉质也变薄了

Professor Ungar wants to find out

恩戈教授想探究

how these very different sets of teeth have adapted to different diets.

各式各样的牙齿是如何适应不同饮食结构的

Enter the BITE Master II.

咀嚼模拟器II出场

This unique machine simulates² chewing.

唯一能够模拟咀嚼的机器

It will put these ancient jaws³ to the test.

我们将用它检测这些古老的颌骨

We're going to set it chewing on different sorts of foods

我们会让它们咀嚼不同的食物

and try and see how the different teeth

努力观察不同的牙齿

affect the way the food's broken down during the chewing.

咀嚼时食物破碎的方式

This is the first time in three million years

这是这些南方古猿的牙齿

that these australopithecus teeth have seen action.

三百万年以来第一次运动

So how will they fare against a raw carrot?

它们进食生胡萝卜时效果如何呢

OK, give it a shot.

好了 试一下吧

1 enamel   

n.珐琅，搪瓷，瓷釉；(牙齿的)珐琅质

参考例句：

• I chipped the enamel on my front tooth when I fell over.我跌倒时门牙的珐琅质碰碎了。
• He collected coloured enamel bowls from Yugoslavia.他藏有来自南斯拉夫的彩色搪瓷碗。

2 simulates   

假装( simulate的第三人称单数 )； 模仿； （用计算机或模型等）模拟

参考例句：

• Viral bovine rhinotracheitis simulates and may be combined with shipping fever. 牛病毒性鼻气管炎和运输热相似，并可能和运输热同时发生。
• The insect simulates a twig. 这种昆虫看上去像一个小树枝。

3 jaws   

n.口部；嘴

参考例句：

• The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。
• The scored jaws of a vise help it bite the work. 台钳上有刻痕的虎钳牙帮助它紧咬住工件。