murmur

There was a low murmur of conversation coming from the back of the library.

(Chinese) 图书馆后方传来了低声交谈的声音。

A murmur of agreement ran through the crowd after the leader spoke.

(Chinese) 在领导人发言后，人群中传出一阵赞同的低语声。

The doctor used a stethoscope to check if the child had a heart murmur.

(Chinese) 医生用听诊器检查孩子是否有心脏杂音。

A minor heart murmur often does not require surgery or intensive treatment.

(Chinese) 轻微的心脏杂音通常不需要手术或强化治疗。