“恕不同意”可以翻译为 “I regret to say that I cannot agree” 或者 “I'm afraid I have to disagree” 等表达。
“I regret to say that I cannot agree” 较为正式、礼貌，常用于较为严肃或正式的场合，先表达遗憾，再说明不能同意的观点。
“I'm afraid I have to disagree” 语气稍显委婉，“I'm afraid” 起到缓冲作用，表明提出不同意见并非易事 。