To have one's lips and mouth parched from extensive talking; to speak at great length until one's mouth is dry.
他为了解释清楚这个复杂的概念，讲得唇焦口燥。
He explained the complex concept at such length that his lips and mouth became parched.
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To have one's lips and mouth parched from extensive talking; to speak at great length until one's mouth is dry.