He mumbles , and that just infuriates me further .

他喃喃自语，这只是我进一步激怒了。

For there are lots of mumbles such as promises .

因为我有许多承诺之类含糊的话。

He mumbles something about knowing better but follows my advice when he spots a massive traffic jam ahead .

他嘟哝着“自己更清楚”什么的，但他发现前方大规模交通堵塞后听从了我的建议。

His face turns crimson , and he mumbles an I love you in return .

他的脸色通红，他喃喃自语的我爱你作为回报。

It was everything I had wanted to say to her and everything I was sure I had to say but when I tried to speak my lips went numb and I was positive that half my words came out as mumbles .

这是一切我本来想对她说，一切我相信我说的话，但是当我试着说出我的嘴唇愣了，我是积极的一半我的话来作为喃喃自语了。