discoursing的例句（discoursing在句子中的用法）

• They have been discoursing learnedly on this problem. 他一直在深入研究这个问题.
• They were discoursing over the latest gossip. 他们在谈论最近的蜚短流长.
• He was discoursing to us on Keats. 他正给我们讲济慈.