增生

例句：

1. 1. The population of thecity is proliferating rapidly.
   这个城市的人口正在迅速增长。
2. 2. The disease has beenspreading throughout the region.
   这种疾病已经在该地区蔓延开来。
3. 3. The company's profits are proliferating due to its successful marketing strategies.
   由于其成功的营销策略，这家公司的利润正在不断增长。