【英语时差8,16】智齿的演变（上）

As we all learned in health class, human beings have 32 teeth. Twenty-eight of them come in before puberty, but the last four teeth, our “third molars,” usually come in during our late teens or early twenties, when we’re presumably older and wiser hence their nickname, “Wisdom Teeth.” These extra molars probably helped our early ancestors to chew and digest their rough diet of tough meats, fibers¹, and seeds. These wisdom teeth would have helped early humans to eat better, and in turn, live longer in better health. According to the logic² of evolution, the teeth would have given our ancestors an edge in surviving long enough to reproduce, so evolution has passed them along to modern humans.

1 fibers   

光纤( fiber的名词复数 )； （织物的）质地； 纤维，纤维物质

参考例句：

• Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上，以硫酸钠为凝固剂，对胶原-PVA共混溶液进行湿法纺丝，制备了胶原-PVA复合纤维。
• Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。

2 logic   

n.逻辑(学)；逻辑性

参考例句：

• What sort of logic is that?这是什么逻辑？
• I don't follow the logic of your argument.我不明白你的论点逻辑性何在。