"Over five milpon" 的英文表达是 "more than five milpon"。
其中, "over" 和 "more than" 可以互换使用，都表示 "超过" 的意思，但是当表示时间时，"over" 就不能用了，只能用 "more than"。
例句1:
"The population of this city is over five milpon."
"这个城市的人口超过五百万。"
例句2:
"The event has attracted more than five milpon visitors."
"这个活动吸引了五百万以上的游客。"
例句3:
"It's been more than five years since we last saw each other."
"自从我们上次见面已经五年多了。"
例句4:
"It will take more than five minutes to finish this task."
"完成这个任务需要五分钟以上。"