抱怨，喃喃声音；幽咽；

1. 失眠的時候做什麼：84. 做過最瘋狂的事情:...i don't know | 85. 失眠的時候做什麼:murmuring... | 86. 無聊的時候做什麼:walking around with no purpose

1. a complaint uttered in a low and indistinct tone

    Synonym: grumblegrumblingmurmurmuttermuttering

2. a low continuous indistinct sound
    often accompanied by movement of the lips without the production of articulate speech

    Synonym: muttermutteringmurmurmurmurationmussitation

1. making a low continuous indistinct sound

    e.g. like murmuring waves
           susurrant voices

    Synonym: susurrantwhispering