crowding factor

例句：

1. 1. The city's population is expected to grow significantly in the next few years.
   预计该城市在未来几年人口将显著增长。
2. 2.The crowded street was a testament to the city's rapid development.
   拥挤的街道是这座城市快速发展的一个证明。
3. 3.The researchers found that the crowding factor had a significant impact on the health of the city's residents.
   研究人员发现，拥挤因素对城市居民的健康产生了重大影响。