无尾猿的脊柱的下端是直的，不是弯曲的。
The lower end of the ape's backbone is straight, not curved.
在动物学中，人类与猿猴和无尾猿被划为一类。
Zoologically speaking, human beings belong firmly among the -monkeys and apes.
无尾猿学东西很快，甚至可以教它们使用简单的工具。
Apes are quick to learn, and they can even be taught to use simple tools.
主要的四种无尾猿是：黑猩猩、狒狒、猩猩和长臂猿。
The four main kinds of apes are the chimpanzee, the gorilla, the orangutan, and the gibbon.
无尾猿的头骨比人类的厚，但是它的脑没有人类的那么大和复杂。
An ape's skull is thicker than a man's, and its brain is not so large or complicated.
无尾猿常患人类所患的相同的疾病，所以，在医学研究中使用它们。
Apes often suffer from the same diseases that people do, so they have been used in medical research.
但是，与人类不同，无尾猿的脚以及手，都有可以与其他手指相对的大拇指。
But unlike man, the ape has opposable thumbs on its feet as well as on its hands.
对人类来说，无尾猿不仅魅力无穷，而且在人类的许多科学研究中大有用场。
Apes are not only fascinating to man, but are also helpful in many of his scientific studies.
无尾猿的身体，在许多方面都像人类。因为这个缘故，无尾猿有时被称为“类人”猿。
The body of an ape is like the human body in many ways. For this reason, apes are sometimes called "man-like" apes.
与人类和其他灵长目动物共有的另一个重要特征是，无尾猿有与其他手指相对的大拇指。
Another important trait that apes share with man and other primates is the opposable thumb.
很多巨大的无尾猿都出现在该清单上，因为它们的栖息地不断处于来自人类的活动威胁下。
Many great apes end up on the list, as their habitat is continually under threat from human activities.
不过，现代灵长目分为两个主要的分支：狐猴和丛猴同属一个分支，猿猴和无尾猿则属于另外一个分支。
But -modern primates are divided into two main groups: the lemurs and bush babies on one hand, and the monkeys and apes on the other.
它们生活在非洲和亚洲的炎热潮湿的森林中，主要以水果、树叶和坚果为食，虽然有些无尾猿也偷食鸟蛋，其他无尾猿可能捕捉小动物为食。
They live in hot, humid forests of Africa and Asia, and feed mainly on fruits, leaves, and nuts, although some apes steal birds' eggs and others may catch small animals for food.
它们生活在非洲和亚洲的炎热潮湿的森林中，主要以水果、树叶和坚果为食，虽然有些无尾猿也偷食鸟蛋，其他无尾猿可能捕捉小动物为食。
They live in hot, humid forests of Africa and Asia, and feed mainly on fruits, leaves, and nuts, although some apes steal birds' eggs and others may catch small animals for food.
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