耶阿吃吃吃
说法比较多,常见的有:1.There are no waves without wind.2.There's no smoke without fire.3.There won't be billows when there's no wind.4.There must be a cause for this.Coming events cast their shadows before. 有时候也有这层意思。

霍爾因斯基
说法比较多,常见的有:1.There are no waves without wind.2.There's no smoke without fire.3.There won't be billows when there's no wind.4.There must be a cause for this.5.Coming events cast their shadows before.
MidnightAngel
无风不起浪: there must be a cause or reason for thisExamples:1. 当然这些暗示是狡诈的,毫无根据的,反对派懂得这点。但选民不一定懂得,他们会说无风不起浪。 Of course, these implications would sly and groundless, and the opposition would realize it. But the voters might not. They would say where there's smoke there's fire.2. 无风不起浪。 No smoke without fire.