To show a variety of expressions or attitudes; to fluctuate in one's demeanor or approach to people and situations.
他是个性情中人，喜怒哀乐都常常眉高眼下，不会刻意掩饰自己的情绪。
He is a very emotional person; his joys, angers, sorrows, and delights often show on his face, and he doesn't deliberately hide his feelings.
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