1、He showed his stonehearted nature by refusing to help the homeless man on the street.
他拒绝帮助那个街上的无家可归者，显示了他冷酷无情的本性。
2、The movie portrayed the antagonist as a stonehearted villain who stopped at nothing to achieve his evil plans.
电影中将反派描绘成一个毫不犹豫去实现恶意计划的冷酷无情的恶棍。