快速增长英语

Rapid expansion of population

应该是have seeing rapid growth,后面的用法是见证的意思，如the city has seen gerat changes in the past 30 years ，用了拟人手法

population is increasing rapidly

在这句话中see不是“看见”或者“见到”的意思，其确切意思“见证”或者“经历”的意思。the utilities sector has seen rapid growth in new service order 汉语意思为：公用工程部门新的服务订单快速增加。再举个例子Great changes have taken place in my hometown. 可以变为My hometown has seen great changes.

the population increases rapidly

快速的 ，迅速的英文可以说quickly，fast。具体读音，搜索下百度翻译吧。

Have visible fast growth