Former U.S. Navy Secretary Richard Danzig once described it as instruments of "nonexplosive warfare."
美国前海军大臣理查德·丹兹格（Richard Danzig）曾将其描述为“非爆炸性战争”的工具。
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And in that way, they offer a glimpse of a rapidly evolving class of dangerous threats that former U.S. Navy Secretary Richard Danzig once described as instruments of "nonexplosive warfare."