stud

n. 图钉,装饰钮扣,
立柱,板墙筋,壁骨
v. 镶嵌,点缀

I saw diamond studs in her ears.

我看见她耳朵上戴着的钻石耳钉。

He knows it very well because he have stud it up in a book.

他对这个问题很了解，因为他为此曾在一本书中查阅过。