discoursing

He was discoursing to us on Keats.

他正给我们讲济慈.

《现代英汉综合大词典》

They were discoursing over the latest gossip.

他们在谈论最近的蜚短流长.

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They have been discoursing learnedly on this problem.

他一直在深入研究这个问题.

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