英汉词典

1. 轻声说话;小声抱怨
    If you mutter, you speak very quietly so that you cannot easily be heard, often because you are complaining about something.

mutter的意思

    e.g. 'God knows what's happening in that madman's mind,' she muttered...
           她咕哝着：“天知道那个疯子在想什么。”
    e.g. She can hear the old woman muttering about consideration...
           她能听到那个老妇人小声咕哝说考虑考虑。