It would be discourteous to ignore his request.
忽略他的要求很不礼貌。
It's discourteous to gossip behind people's backs.
背后说人闲话是不礼貌的！
Looking at your watch during an event is also considered to be discourteous.
在一场活动中看着你的手表也被认为是不礼貌的。
"Son," replied the father, "that driver is certainly discourteous and probably stupid."
“儿子，”父亲回答道，“那个司机确实是没有礼貌，还可能比较愚蠢。”
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。
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。
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