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我们常能在牢狱、战场上的据点与边境上看到铁丝网。它看起来很平常,只是铁丝上面带着尖刺而已。不过你可别小看它,在一百多年前,这可是一个非常
We can often see barbed wire at prisons and on battlefields and borders. It looks very ordinary, but with spikes just above the wire. But you do not underestimate it, a hundred years ago, this is a very