the practice of attacking and robbing ships at sea
海盗行为,海上劫掠。
a similar practice in other contexts, especially hijacking
抢劫行为,劫持行为;劫机
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air piracy. 空中抢劫。
the unauthorized use or reproduction of another's work
盗版行为
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software piracy. 软件盗版。
"mid 16th cent.: via medieval Latin from Greek