表示听到一些事情后很惊讶,从自己的主观角度上简直不能相信,在美剧中经常出现.
It is an expression of amazement and disbelief.
例句
Bob:Tom was just elected president of the trade association!Mary:I don't believe it!
Bob:They're going to build a Disney World in Moscow.Sally:I don't believe it!