Why do we seem to have lost the grammar of ethical discourse, at least in business?

He discoursed upon the poetic style of John Keats.

他讲了约翰·济慈的诗歌风格.

Our teacher discoursed for hours upon Greek.

我们老师就希腊文学讲了几个小时.

I discoursed ( as I suppose ) with considerable spirit ; my companion sat listening breathless.

我兴致勃勃地讲演 ( 我以为是讲演 ) 起来. 我的同伴坐着屏息静听.

He discoursed impressively on Newton's theory of gravity.

他讲述了牛顿的引力定律,给人以深刻的印象.

He discoursed on his understanding of the new laws that would take effect.

他阐述了他对这个即将生效的法令的理解看法.

The preparation and purification methods of pyridine hydrochloride were discoursed in the paper.

本文叙述了盐酸吡啶的制备及精制方法.

The minister took up the theme and discoursed mellifluously on the ebb and flow of empires.

大臣接过话锋,滔滔不绝地谈论起古今多少帝国的盛衰兴亡.

He was discoursing to us on Keats.

他正给我们讲济慈.

They were discoursing over the latest gossip.

他们在谈论最近的蜚短流长.

They have been discoursing learnedly on this problem.

他一直在深入研究这个问题.

It would be discourteous to ignore his request.

忽略他的要求很不礼貌.

It was discourteous of you to arrive late.

你迟到了,真没礼貌.

His behaviour was wanting in courtesy , ie discourteous, rude.

他举止没有礼貌.

I was offended by his discourteous reply.

他无礼的回答使我很生气.

Lateness is discourteous to your classmates and to your professor.

迟到是对你同学和教授的不尊敬.

The above telephone conversation is not only discourteous, but also hurts business prospects.

以上的电话交谈非但粗鲁，亦损及商机。

Do not arrive tardy, can let superior had waited again long and discourteous.

迟迟不到, 则又会让上级等候过久而失礼.

To cast me off discourteously.

将我无情地抛去.

I must apologize for my discourtesy in arriving late.

我要为迟到失礼而道歉.

She felt she had committed a discourtesy.

她觉得自己做了一件不礼貌的事.