3-第九章：欢迎来到阴险要塞(7)

Beyond that were slaves' quarters and kitchens and exercise yards for the horses and training grounds for the gladiators and little temples for the gods and heated swimming baths for the Consul and senior soldiers and stores of ammunition and gigantic equipment for breaking a barricade and field after field of crops.
And this entire, massive area was encircled by high wooden fences, with watchtowers manned by sentries every hundred meters. Four enormous observation balloons sailed overhead. These balloons were powered by the flaming breath of a dragon kept in a cage just above the basket, and they were manned with more sentries, keeping a sharp eye out for escapees or invaders.