mumble（v）含糊的说某事，唧咕 ～ about sth ～ sth to sb
What are you mumbling about？
你在唧咕说些什么
Mumble: Wait! Watch this!
等一下！看这个。
After a while, the sleeping Cayce would start to mumble, as though searching for something.
过一会儿，睡着的凯西会开始咕哝，好像在寻找什么。
When Western leaders visit Moscow, Riyadh or Beijing, they merely mumble about human rights.
当西方国家领导人访问莫斯科、利雅得和【敏感词】的时候，对人权问题他们只是含糊其辞。
murmur（v）发出连续而低沉的声音
The wind murmured in the trees
风在林中低鸣。
Sometimes, he/she will just murmur or will not clearly answer the question.
有时，他/她只是在低语或者不清楚地回答问题。
They will murmur on to fill any quietness if it extends for more than a moment.
如果沉默的时间超过一会儿，他们就会低声说话填补沉默的时间。
The breeze therefrom that ruffled our little world sounded in reality but little above a murmur.
那一阵从那而来的微风，吹皱了我们的小小世界，但它实际上的声音，只略高于低语。