像这样的电磁炮同样也可用于阻止海盗袭击商用船只。
A gun like this would also be useful for stopping pirate attacks against commercial shipping.
(在西方的航海史上，)荷兰人首先将商用船只用来休闲娱乐。
The Dutch were the first to use commercial vessels for pleasure.
(在西方的航海史上，)荷兰人首先将商用船只用来休闲娱乐。
The Dutch were the first to use commercial vessels for pleasure.
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