from mouth to mouth

例句：

1. 1. Thenews spread from mouth to mouth like wildfire.
   消息像野火一样迅速传播开来。
2. 2. The story was passed down from mouthto mouth for generations.
   这个故事代代相传。
3. 3.The message was quickly passed from mouth tomouth.
   信息很快在人群中传开。