【明報專訊】"Sometimes we do one thing that causes ( 引 致 ) another thing to happen ( 發 生 )," Oliver said. "Then, other things happen and keep happening — and all because of the first thing." Oliver paused. "If you want, I can show you what I mean..." he said. "No thanks, Oliver, that won't be necessary," I advised, "but you should mention ( 提 到 ) that what you have described is called a / the knock-on effect." Example: "The knock-on effect was clearly apparent ( 顯 而 易 見 的 ) when, one after another, all the stock markets in the world rose to new overnight highs."