我们的祖先是草食动物，因此需要强壮的磨牙来混合和咀嚼植物。
Our ancestors, known to be herbivores, needed strong molars for mashing up and chewing plant material.
而有强壮颌骨的动物，如大猩猩和猩猩，则适应吃那些需要很多咀嚼的食物。
Animals with robust jaws, like gorillas and orang-utans, have long been known to be adapted to eating foods that require a lot of chewing.
依据该动物的颌骨计算表明，它能以15万牛顿的力度把猎物咬伤，咀嚼力度是霸王龙的四倍。
Calculations based on the animal's jaw bones suggest it could have bitten into its prey with a force of 150 kilonewtons, or four times the force thought to be exerted by the jaws of a T. rex.
这些纹路能告诉科学家们这些动物可能是怎样咀嚼食物的，而牙齿上并没有坑坑洼洼的小坑，这个迹象告诉我们鸭嘴龙吃什么。
While the scratches told the scientists how the animal may have chewed, the lack of pit marks on the teeth suggested what the hadrosaur was eating.
不过，如果一种动物无需咀嚼的话，那么它就不需要一个很大的头部了。
我们不知道，这个袋子已经被动物咀嚼了很多次，沦落在这座非常古老的建筑中已经至少几个月的时间。我们不知道袋子里有这些东西。
Unbeknownst to us, this bag that was all chewed up from animals or moths or something that had gotten trapped in a very old building, contained these items.
按照动物的直觉，把肉丸吃掉的最好方法，是把它整个放到嘴里然后咀嚼。
According to animal instincts, the best way to eat it is to put the entire thing in your mouth and chew.
在你为这些仓鼠轮工厂的照相之前，这些动物必须做的全部事情就是用力咀嚼牠们的食物——专门浓缩的植物性废料，然后排出除粪便。
Before you get images of hamster-wheel factories of, all the animals have to do is munch on their diet of specially enriched plant waste, and then poop it out.
这是一个原始人吃食草动物和强硬，难以咀嚼，植物。
This hominid was a herbivore and ate tough, hard to chew, plants.
香草美味的护牙小精灵咀嚼片，有趣可爱的动物形状，还含有天然护牙全食物的混合营养素。
Delicious vanilla tooth Fairy Chewables, in fun animal shapes, also contain a targeted whole food blend of natural tooth-friendly nutrients!
热带的雨林野生动物图片。深红色金刚鹦鹉被捕捉大声咀嚼一些点心在巴西的亚马逊热带雨林。
Gallery: Tropical forest Wildlife a scarlet macaw is caught munching a snack in Brazil's Amazon forest.
热带的雨林野生动物图片。深红色金刚鹦鹉被捕捉大声咀嚼一些点心在巴西的亚马逊热带雨林。
Gallery: Tropical forest Wildlife a scarlet macaw is caught munching a snack in Brazil's Amazon forest.
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