To talk oneself hoarse; to talk till one's lips are parched and one's tongue is worn out from excessive speech.
为了解释清楚这项复杂的技术，他给大家讲得唇焦舌敝，嗓子都哑了。
To explain the complex technology clearly, he talked to everyone till his lips were parched and his tongue worn out, and his voice became hoarse.
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