柯林斯词典narrow down (narrowing,narrowed,narrower,narrows,narrowest) 1. PHRASAL VERB If you narrow down a range of things, you reduce the number of things included in it. 缩减 What's happened is that the new results narrow down the possibilities. 现有的情况是，新的结果缩小了可能性的范围。 返回 narrow down