这一别墅变“堡垒”的过程，是通过一系列墙体和百叶窗的移动实现的。

The fortress effect is achieved by a series of moving walls and shutters.

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在古代，它们的大块头还使它们成为移动的堡垒，能够在背上驮着士兵和弓箭手。

In antiquity, their bulk also allowed them to become mobile fortresses, capable of carrying soldiers and archers on their backs.

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