sign propagation

例句：

1. 1. The new technology allows for faster signal propagation.
   新技术允许更快的信号传播。
2. 2. The company's logo is a symbol of its brand identity.
   公司的logo是其品牌身份的象征。
3. 3. The message was quickly propagated throughout the region.
   消息迅速在整个地区传播开来。