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。

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。

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。

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。

For cutting and slicing, hold the knife with your thumb and index finger gripping the top of the blade, and wrap your other fingers around the handle.

切割或切片时用拇指和食指捏住刀刃上方，其他手指顺势握住刀柄。