baozi可數嗎?

　　例句：

　　Ty asks how to defrost a hot dog bun.

　　泰問如何解凍熱狗面包。

　　She wore her hair in a bun.

　　她盤了個發髻。

　　Her hair was tied severely in a bun.

　　她的頭發簡單地盤成了一個發髻。