If you murmur something, you say it very quietly, so that not many people can hear what you are saying. 小声说
noun [具体名词] 低语声，轻柔的谈话声；持续轻柔的声音；私下的抱怨，咕哝；（医）（心脏的）杂音
A murmur is something that is said but can hardly be heard. 低语 They spoke in low murmurs. 他们窃窃私语。
verb [vt. 及物动词] 低语，轻声地说；私下抱怨，发牢骚；发出持续轻柔的声音
He turned and murmured something to the professor. 他转过身，小声对教授说了些什么。
