3. 痛失良机 Let something slip through one’s fingers
没有抓住机会会怎样?就会“痛失良机”了,“让什么东西从你的手指尖溜走”就表示“痛失机会”,例如:You can’t be more stupid! How could you let such a golden opportunity to make big money slip through your fingers? It was an opportunity that comes once in a blue moon. (你真蠢!这样一个发大财的机会千载难逢,你怎能眼睁睁的让他跑掉那?)这里的 once in a blue moon 就是指“千载难逢”。