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VERB
講道；布道；傳教
When a member of the clergy preaches a sermon, he or she gives a talk on a religious or moral subject during a religious service.
例句
At High Mass the priest preached a sermon on the devil...
牧師在大彌撒上布道驅邪。
The bishop preached to a crowd of several hundred local people...
主教向當地聚集的數百人布道。
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VERB
宣傳；鼓吹
When people preach a belief or a course of action, they try to persuade other people to accept the belief or to take the course of action.
例句
The Prime Minister said he was trying to preach peace and tolerance to his people...
首相表示他在竭力向他的人民宣傳和平和寬容。
Health experts are now preaching that even a little exercise is far better than none at all...
現在健康專家都在宣揚，即使是少量的運動也遠比根本不運動好得多。
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VERB
說教；嘮叨；不勝其煩地勸誡
If someone gives you advice in a very serious, boring way, you can say that they are preaching at you.
例句
'Don't preach at me,' he shouted.
他大喊道：“不要對我說教。”
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PHRASE
以身作則；身體力行；躬行己說
If you say that someone practises what they preach, you mean that they behave in the way that they encourage other people to behave in.
例句
He ought to practise what he preaches.
他應該以身作則。
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PHRASE
向教徒傳道（表示向已經接受某種思想的人宣傳這種思想）
If you say that someone is preaching to the converted, you mean that they are wasting their time because they are trying to persuade people to think or believe in things that they already think or believe in.