牙白口清

Explanation: Metaphor to speak clearly. 　　Usage: Joint type; as predicate, attributive; metaphor to speak clearly 　　Source: Qing Wen Kang, "Tale of Heroes" Di Jiuhui Street Blues was _set_ when how to ask him a clean white teeth, not anxious, said 'sister, father and mother to decide this matter, Zensheng's sister just asked to? '" 　　Examples: How to ask when he was given a Street Blues ~, anxious not, said her sister, father and mother to decide this matter, Zensheng's sister to just ask? "(Ching, Culture and Sport," Tale of Heroes "Di Jiuhui