如今他们已丧失了这种天然的防卫手段。
这是一种对抗鸟类、爬行动物、两栖动物等袭击的基本防卫手段。
It's basically a defense against birds, reptiles, amphibians, that sort of thing.
我们想要的防卫手段，并不是马奇诺防线那样的东西，而更像是运动战。
The kind of defence we want is not something akin to the Maginot Line, but more like manoeuvre warfare.
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