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1·Now, a study of chick embryos shows that birds do indeed have thumb, index, and middle fingers in their wings.

现在，一份对鸡胚胎的研究，鸟类的翅膀的趾中确实有类似于人类拇指、食指和中指的趾的分化。

2·His left forearm and three fingers on his right hand were amputated-the thumb, index, and middle.

他的左前臂和右手的三个手指：拇指、食指和中指，被截肢。

3·Say when you're at the front of C prime, your thumb points to the right, your index points up because that's where the surface is, and then your middle finger will point out.

你在曲线C的前端，你的拇指指向右边，你给指出来了，因为那就是这个表面所在，然后你的中指就会指出。

4·Start by holding a small amount of the cable with your thumb and/or middle finger. Then, with your other hand, begin wrapping the cable in a figure-8 between your pinky and index fingers.

开始先用拇指和中指捏一段线在手里，然后，用另一只手把线绕在食指和小拇指上，成8字形。

5·Use your thumb and index fingers to gently massage your ear lobes in small circles.

用你的大拇指和食指捏住耳垂，进行小弧度的温柔按摩。 享受几分钟后，移动你的手指到外耳的中部，轻轻地旋转你的整个耳朵。

6·Now, these index-limitation guidelines are more rules of thumb than rules to live by.

现在，这些索引限制指南已经成为首要规则，而不仅仅是指南而已。

7·Gently squeeze it between thumb and index fingers.

用拇指和食指的之隙挤捏它。

8·Normal vector points up. Imagine that you put your thumb along c, your index towards s and then your middle finger points up.

法向量向上，想象你把你的大拇指沿着C放，食指指向s，那么你的中指就会向上。

9·The distance between the index finger and the thumb was estimated to be on average 69 per cent larger than the actual size of the participants’ hands.

关于食指与拇指之间的距离，估计值比参与者左手食指与拇指的实际距离平均要长69%。

10·I've never used these for food, she said, kneading it between her index finger and thumb, a chef inspecting an unfamiliar piece of meat.

“我没用过这些食材，”她拿食指和拇指捏着，像位大厨检视不熟悉的肉片。