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. 縮減 What's happened is that the new results narrow down the possibilities. 現有的情況是，新的結果縮小了可能性的範圍。 返回 narrow down