spread parameter

例句：

1. 1. The spread of the virusis a concern for public health officials.
   病毒的传播是公共卫生官员的担忧。
2. 2. The spreadof knowledge is essential for progress in anyfield.
   知识的传播对于任何领域的进步都至关重要。
3. 3. The spread of information can be influencedby various factors, such as technology andculture.
   信息的传播受到各种因素的影响，如技术和文化。