The [ ？] sound. It's a vowel ， but it's a lot like the "r" consonant.
To make this vowel sound， the tongue fattens up and comes up a little
bit in the back. Ur. So ， the back of my tongue is touching the back
of my throat. Ur， ur. Because it has fattened itself up in the back，
so it can touch back there， what that means is that the front of the
tongue is not touching anything. It's just， ur ， hanging out in the
middle of my mouth. As you can see， the lips ， ur ， they do a lot like
they do on the vowel uh （pull） they come in a little bit and the lips
go out a little bit. Ur ： learn， brrr it's cold ！（It's not really.）

    Ur. Brrr， learn， person. [？] 音是一个元音，不过它和辅音r 的发音
有很多相似处。发此音时，舌根处摊平并略微抬起。Ur. 舌跟碰到喉咙的后部。

    Ur，ur. 因为舌跟处放平了，所以它可以触及喉咙后部，也就是说舌头的前
部不碰到任何东西，它只是停留在口腔中央。就像你所看到的，嘴唇的样子和发
元音uh（pull中的[u] 音）时非常相近。嘴唇稍稍向中间聚拢并向外突起。Ur：
learn ，brrr it's cold！（其实并不冷呵呵）Ur. Brrr， learn， person.

    Sample words：

    brrr（表示冷颤或领悟）呵，哦

    person人

    Sample sentence ：

    It's her turn to learn a word.轮到她学个词了。