Be level-headed头脑冷静的人
level-headed sober清醒的
be level-headed man头脑冷静的人
cool-headed level-headed头脑冷静的
ADJ（形容词） If you describe a person as level-headed, you mean that they are calm and sensible even in difficult situations. 头脑冷静的; 理智的
Simon is level-headed and practical.
西蒙头脑冷静，讲求实际。