of, referring to, or denoting a vowel whose articulation is made by boosting the back again from the tongue toward the delicate palate or the blade to the really hard palate, for example with the ee in English see or oo in English moon Look at low1知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。T