You use entire when you want to emphasize that you are referring to the whole of something, for example, the whole of a place, time, or population.
He had spent his entire life in China as a doctor.
他一生都在中国做医生。
There are only 60 swimming pools in the entire country.
整个国家仅有60个游泳池。
The Great Barrier Reef runs almost the entire length of Queensland.
大堡礁的长度几乎与整个昆士兰的长度等同。
three per cent of the entire Scottish population.
整个苏格兰的人口的百分之三。