serious and responsible man
definitions
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A man characterized by maturity, reliability, and a sense of duty, who approaches life and tasks with gravity and conscientiousness.ja: 真面目で責任感のある男性
examples
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After years of hard work, he proved himself to be a serious and responsible man.
長年の努力の末、彼は真面目で責任感のある男性であることを証明した。