1. 不同意;有分歧;意见不合
    If you disagree with someone or disagree with what they say, you do not accept that what they say is true or correct. You can also say that two people disagree .

    e.g. You must continue to see them no matter how much you may disagree with them...
           无论你和他们之间有多大的分歧，你都得继续去看他们。
    e.g. They can communicate even when they strongly disagree...
           即便在有很大分歧时，他们也还是能够交流。

2. 不赞成;反对
    If you disagree with a particular action or proposal, you disapprove of it and believe that it is wrong.

    e.g. I respect the president but I disagree with his decision...
           我尊敬总统，但我反对他的这个决定。
    e.g. I disagree with drug laws in general.
           总的来说，我反对药品法。

3. (尤指食物)对…不适宜，使…身体不适，不合…胃口
    If a particular food or drink disagrees with you, it makes you feel unwell.

    e.g. Orange juice seems to disagree with some babies.
           橙汁似乎不适合某些婴儿饮用。