To expound at great length; to hold forth extravagantly or voluminously; to display one's literary talent with elaborate rhetoric.
那位新晋作家在他的作品中大肆厥辞，用华丽的词藻和丰富的想象力构建了一个独特的文学世界。
The budding author profusely displayed his eloquence in his work, constructing a unique literary world with flowery language and rich imagination.
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