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现在建筑到达一定等级后,都是开新星球,不再升级了.因为时间又长,资源又耗多.没什么人升高级的地质学.(我才4级)
我就升了 - -。。。。。。
地质学我也满了- -
已经不算很长了。。。这也是缩短新人和老人差距的一种方法
