The more cities that you have REXed, the earlier your core cities can start concentrating on improvements, while your outer cities build baracks/units/workers/settlers.

• 在快速扩张期间如果你有更多的城市，你的早期的核心城市就能尽早地开始进行城市建设，此时你可以用外围城市来建造兵营/军队/工人/移民。