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

熊的手没有对生拇指，真正的手指。

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

这些对生拇指是人类与黑猩猩等灵长类近亲的共同特征。

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

科学家说，如果没有我们对生的拇指， 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拇指，好像它是只有人类才有的东西。

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

说某人没有对生拇指可能是对某人的一种侮辱。

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

灵长类动物的主要特征之一是可以抓握的手和脚，并且通常有相对的拇指和脚趾。

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

它们的后脚各有一个大而无爪的可对立的指头，这样就可以用脚抓住树枝，腾出手来觅食。

Opposable thumbs, cranial size, altruism and cooking all played a part, but central to the naked ape's success was its ability to dominate other species.

对生拇指、头颅大小、利他主义以及烹饪都是其中原因，但人类能够成功统治地球的最主要原因是支配其他物种的能力。

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，它们的手指相对;他们有一些东西就像我们相对的拇指。

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

“opposable thumb”这个短语将人类拇指的概念与其他没有这种能力的动物区分开来。

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.

潜水机器人的人手， 灵活的手指和相对的拇指，是进行水下采样缓慢而繁琐的工作的绝佳工具。

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.

羊驼的脚趾很大很结实，灵长类动物的脚一般也大而有力，有着又长又灵活灵活的脚趾和拇指状和其他手指相对的指头，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的烹饪技术帮助我们避开了很多植物的自我防卫系统，但是如果我们不小心，呋喃香豆素还是会对我们造成影响的。

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，你的拇指接触指尖或竖起大拇指的能力要归功于你的马鞍关节促进的对向运动，这使得你的拇指可以对向。

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，你的力量就在你自己的手中——那双奇妙的对生拇指——以及你的鼻子。

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，我们的对生拇指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.

比蜘蛛猴的无拇指或绒猴的不对生拇指更强壮、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."

“它利用伪拇指作为一种非常粗糙的对生拇指来抓住竹子，有点像我们自己的拇指，只不过伪拇指位于手腕处，比人类的拇指短得多。”

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“可对生拇指” 这个表达的含义。在人类和其他灵长类动物中，可对生拇指是拇指与手的其他手指相对的能力。

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的主要特征之一是可以抓住并且通常具有相对的拇指和脚趾的手和脚。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。