词典释义：
deliver a sermon or religious address to an assembled group of people, typically in church
（尤指在教堂聚众）布道；宣讲
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he preached to a large congregation 他在一场大型圣会上布道
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[with obj.]
our pastor will preach the sermon .我们的牧师将宣讲这条训诫。
[with obj.]publicly proclaim or teach (a religious message or belief)
公开宣讲（教义，信仰）
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a Church that preaches the good news of Jesus .宣讲基督福音的教会。
[with obj.]earnestly advocate (a belief or course of action)
竭力鼓吹，宣传（信念，行动）
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my parents have always preached toleration and moderation .我父母一向极力推崇容忍和中庸的思想。
give moral advice to someone in an annoying or pompously self-righteous way
（喋喋不休或自以为是地）告诫；说教
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viewers want to be entertained, not preached at .观众想要的是娱乐，而不是说教。
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preach to the converted advocate something to people who already share one's convictions about its merits or importance 向皈依者布道（对已经有信念者做宣传）
"Middle English： from Old French