He never backs down from a challenge.(他从不退缩面对挑战。)He always keeps his word.(他总是言出必行。)He is a man of his principles.(他是个有原则的人。)He is fearless in the face of danger.(他在面对危险时毫不畏惧。)He takes responsibility for his actions.(他对自己的行为负责。)这些句子都可以用来表现一个男子汉的性格特征,如勇气、诚信、原则、责任感等。可以在日常生活中使用或作为描述男性角色特征的素材。