pin down

汉语翻译

使受约束, 把...别住(或钉牢), 阻止, 压制, 使明确说明, 证实

英语解释

动词 pin down:

define clearly同义词：peg down, nail down, narrow down, narrow, specifyattach with or as if with a pin同义词：pin up

例句

It was difficult to pin down exactly what it was in her that pleased him so much.很难确切说清她身上有什么东西使他这样动心。She's a difficult person to pin down.她这人行事、说话没个准儿。