4) A joke never gains an enemy but often loses a friend.
开玩笑总不能化敌为友，反而有时会失去朋友。
5) friendship index
敌友指数
1.
After having been analyzed the maximum utility of the reasonable individual behavior in social group by the friendship index model, the paper pointed out that the factors of social group size in animal and human being are the characteristic and varying size of friendship index, and individual action cost.
用敌友指数建立的理性个体在社群中行为效用最大化模型分析社群后 ,指出敌友指数的性质和大小以及个体行为成本的高低是影响动物和人类社群大小的因素 ,人类社群行为和动物社群行为都遵循理性个体行为效用最大化的经济规
6) identification,friend or foe,IFF
敌友识别
补充资料：戏谑
打趣；开玩笑：善戏谑兮不为虐兮｜新房里充满戏谑的笑声。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条