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1·He is legendary for his fearlessness and pugnacity.

他以无畏及好斗而名扬四海。《柯林斯英汉双解大词典》

2·Your pugnacity of yesterday will concentrate mainly on material objectives.

你往日的好斗将主要集中在物质目标上。

3·Excitement of the HPA axis can affect the centrum, such as blues, angst, anorexia, pugnacity et al, these symptom accelerate gastric ulcer.

应激时HPA轴兴奋可产生明显的中枢效应，如抑郁、焦虑、厌食及攻击性增加等情绪行为改变，加速溃疡的形成。