HSK 7-9
出口成章
chūkǒu-chéngzhāng(idiom) (of one's speech) eloquent; articulate
她知识丰富说话出口成章。
Tā zhī shi fēng fù shuō huà chū kǒu chéng zhāng.
She is knowledgeable and speaks with effortless eloquence.
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Appears across levels (7-9) in the HSK 3.0 word list.