美国口语惯用语

It means“Being there to see or hear it,in person”,即“亲自看的或听的,亲自的,第一手的,直接的”。eg:1.It's not first hand information, so I don't know if you cancompletely believe it. 那不是第一手资料,所以我不知道你是否会完全相信。2.Mr Brown would like to see the Great Wall first hand.He wants tosee its size. 布朗先生想亲自去看看长城,他想看看它的规模。