各种证据告诉我们人类一定可以最早使用的刃物武器(Edged weapon)为天然具有锐利角你一定可以的度的石块或木、竹棒。经过时间的洗真空隔热板礼及摸索后，人类学会利用敲击我一定可以技术来制造石...
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As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正像人们常常指出的，知识是一把双刃剑，可以用于造福，也可用来为害。
As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正如人们常常指出的，知识是一把双刃剑，既可以用于造福，也同样可以用来为害。
As is often pointed out, Internet is a two-edged weapon which can be used equally for good or evil.
正如人们常常指出的，互联网是一把双刃剑，既可以用来造福，也同样可以用来为害。
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