Forgery: something, for example a document, piece of paper money, etc., that has been copied in order to deceive people 伪造品;赝品
Experts are dismissing claims that the painting is a forgery. 专家排除了这幅画是赝品的说法.
Forge: to make an illegal copy of something in order to deceive people 伪造;假冒
to forge a passport/banknote/cheque 伪造护照/钞票/支票
He's getting good at forging his mother's signature. 他把母亲的签名伪造得越来越维妙维肖了.
there're compelling reasons to believe that:有强烈的理由相信
compelling:that makes you think it is true 令人信服的
There is no compelling reason to believe him. 没有令人信服的理由让人相信他.
compelling evidence 有说服力的证据