A bear's hand lacks an opposable thumb, a true digit.

熊手没有对生，真正手。

These opposable thumbs are a trait that humans share with our primate cousins such as chimpanzees.

这些对生人类与黑猩猩等灵长类近亲共同特征。

Scientists say without our opposable thumbs, humans might not have survived.

科学家说，如果没有我们对生， 人类可能无法生存。

Sometimes people talk about the opposable thumb as if it is something that only human beings had.

有时人们谈论可对生，好像它只有人类才有东西。

To say that someone doesn't have opposable thumbs might be a form of an insult to someone.

说某人没有对生可能对某人一种侮辱。

Among the key features found in primates are hands and feet that can grasp and often have opposable thumbs and toes.

灵长类动物主要特征之一可以抓握手和脚，并且通常有相对和脚趾。

Their back paws each have one large clawless opposable digit, which allows them to grasp branches with their feet, freeing their hands to forage.

它们后脚各有一个大而无爪可对立头，这样就可以用脚抓住树枝，腾出手来觅食。

In fact, there are other animals such as apes that have opposable digits; they have something that is like our opposable thumb.

事实上，还有其他动物， 如猿类，它们手相对;他们有一些东西就像我们相对。

The phrase " opposable thumb" distinguishes (makes different) the idea of the human thumb from other animals who don't have this ability.

“opposable thumb”这个短语将人类概念与其他没有这种能力动物区分开来。

The scuba-bot’s human-like hands, with its nimble fingers and opposable thumbs, are fantastic tools for the slow, fiddly work involved in taking underwater samples.

潜水机器人人手， 灵活手和相对，进行水下采样缓慢而繁琐工作绝佳工具。

Alpacas have too big, sturdy toes, primates usually have big strong feet with very long flexible toes and a thumb like opposable finger for gripping and swinging.

羊驼脚趾很大很结实，灵长类动物脚一般也大而有力，有着又长又灵活灵活脚趾和状和其他手相对头，用于抓握和摆动。

As humans, our opposable thumbs and culinary arts have helped us get around a lot of plant defense systems, but furanocoumarins can still affect us if we're not careful.

作为人类，我们进化成熟并掌握烹饪技术帮助我们避开了很多植物自我防卫系统，但如果我们不小心，呋喃香豆素还会对我们造成影响。

If you want to start eating differently, the power is, to a large extent, in your own hands -- with those marvellous opposable thumbs -- as well as in your nose.

如果你想开始改变饮食方式，很大程度上，你力量就在你自己手中——那双奇妙对生——以及你鼻子。

For example, your ability to touch your thumb to your fingertips or give a thumbs up is thanks to opposition movement, facilitated by your saddle joint, which makes your thumbs opposable.

例如，你接触尖或竖起大能力要归功于你马鞍关节促进对向运动，这使得你可以对向。

As humans, our opposable thumbs and culinary arts have helped us get around a lot of plant defense systems, but furanocoumarins can still affect us if we’re not careful.

作为人类，我们对生和烹饪艺术帮助我们避开了许多植物防御系统， 但如果我们不小心， 呋喃香豆素仍然会影响我们。

One of the hallmarks of being a hominid is having opposable thumbs: stronger, longer and more flexible than the thumbless hands of a spider monkey or the non-opposable thumbs of a marmoset.

比蜘蛛猴无或绒猴不对生更强壮、更长、更灵活。

Wang said: " It uses the false thumb as a very crude opposable thumb to grasp bamboo, sort of like our own thumbs except it is located at the wrist and is much shorter than human thumbs."

“它利用伪作为一种非常粗糙对生来抓住竹子，有点像我们自己，只不过伪位于手腕处，比人类短得多。”

Peter wants to know the meaning of the expression " opposable thumb." An opposable thumb, in humans and other primate animals, is the ability of the thumb to be placed against the other fingers of the hand.

Peter 想知道“可对生” 这个表达含义。在人类和其他灵长类动物中，可对生与手其他手相对能力。

Among the key features found in primates are hands and feet that can grasp and often have opposable thumbs and toes. That means that primates are better than other animals at holding, moving and using objects.

在灵长类动物中发现主要特征之一可以抓住并且通常具有相对和脚趾手和脚。这意味着灵长类动物在握住、移动和使用物体方面比其他动物更好。

Isn't it possible that the opposable thumb, doubtless in a rudimentary form, was developed in the remote ancestor of man and the gorilla in certain individuals, and was a characteristic that only became common to all after innumerable generations?

可对生，无疑一种基本形式，有没有可能在人类远古祖先和某些个体大猩猩中发展起来，并且经过无数代之后才为所有人所共有特征？