warn /wɔ:n/ vt.警告，告诫（跟宾语 + of/about、宾语+against、宾语+不定式和宾语+从句）： He was warned of the danger. 他被警告有危险。A new U.S. intelligence report warns of the risks of instability resulting from water challenges over the next decade. 美国一份最新情报报告警示，未来十年水资源危机或将引发局势动荡，相关风险不容忽视。She warned us about the serious situation. 她告诫我们面临的严峻局势。He warned me against crossing the street at that place. 他告诫我不可在那个地方过马路。He warned me to stay away from those people. 他警告我跟那些人离远点。We warned them not to skate on such thin ice.我们警告他们不要在那么薄的冰上溜冰。 The clouds warned us that a storm was coming up. 云预示暴风雨即将来临。
warning n. 警告，告诫；警报
