warfare
US /ˈwɔːr.fer/
UK /ˈwɔːr.fer/

1.
战争, 交战
engagement in or the activities of war or conflict.
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Modern warfare often involves cyber attacks and drones.
现代战争常涉及网络攻击和无人机。
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The history of human civilization is marked by periods of intense warfare.
人类文明史以激烈的战争时期为标志。