双语例句
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While its exact range is classified, Doug Beason, an expert in directed-energy weapons, puts it at about 700 meters, and the beam cannot penetrate a number of materials, such as aluminum.
当它的确切范围被划分后，一个定向能武器专家Doug Beason，把它放在700米，而波束不能穿透一些材料，如铝。