指甲指甲由称为角质的硬脆物质组成。

Nails Nails are made of a brittle material called keratin.

youdao

米什卡找到个指甲剪，开始仔细地修起他的指甲来。

Mishka got some nail scissors and started carefully trimming his fingernails.

《柯林斯英汉双解大词典》

她的指甲上涂了一层鲜亮的红指甲油。

Her nails were varnished a brilliant shade of red.

《牛津词典》

And to give you a size perspective, that is about the size of my pinky finger nail, 4 mm on the side.

这个芯片，有我的手指甲那么大，边长4毫米。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

It's unbearable. It's really uncomfortable, it makes you want to bite your nails or just run out of the room.

这真让人难以忍受。你感觉很不自在，这让你想咬指甲或者干脆夺门而出。

Is there any 课堂 - SpeakingMax英语口语达人

Again, the size is of your pinky finger nail, all within the skin so you can just turn out your information to drive, for example a replaced arm or a computer screen.

这同样与手指甲那么大，因为放在皮肤下，所以你只要发出信息既可以驱动，诸如你的假肢或者电脑屏幕等。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选