purr

例句：

1. 1. 低语，轻声细语2.
   动物
2. 3.
   声音
3. 1. The catpurred contentedly as it settleddown for the night.
   猫在安顿下来睡觉时发出了满足的低语。
4. 2. Thedog's low growl was awarning to the other animals in the pack.
   狗低沉的咆哮声警告了群中的其他动物。
5. 3. The baby elephant purred contentedly as it nursed its mother.
   小象在喂奶时发出了满足的低语。