propagation of microwave

例句：

1. 1. The news quickly spread throughout the city.
   新闻迅速在整个城市传播开来。
2. 2. The theory of relativity is a fundamental principle of physics.
   相对论是物理学的一个基本原理。
3. 3. The company's new product has been widely propagated in the market.
   该公司的新产品在市场上得到了广泛推广。