discoursing
vi.
演说（discourse的现在分词形式）;
例句:
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He was discoursing to us on Keats.
他正给我们讲济慈.
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He found the time better employed in searching than in discussing, in discovering than in discoursing.
他认为与其把时间花费在你争我辩和高谈阔论上, 不如用在研究和发现上.
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They were discoursing over the latest gossip.
他们在谈论最近的蜚短流长.