To speak with exceptional eloquence and profound insight, where one's words are so brilliant they are likened to pearls, indicating great erudition and articulation.
这位教授学识渊博，每次演讲都喷唾成珠，引人入胜。
This professor is highly knowledgeable; every time he gives a speech, his words are so eloquent and profound that they seem to turn into pearls, captivating the audience.
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