含有音标[ə:] 的英语单词有哪些

这个超级多的单词啊.最常见的字母组合有：ir （例如bird,first),or (例如worse,worker),er (例如her,herb),ear (early,earth)多找几个 谢谢girl, skirt, third, circuit, dirt, sir, hurt, church,turn, murder, learn, perhaps, nerve....