careful;mindful;conscientious ;

She saw young people waste their talents and fling their lives as carelessly as cigarette stubs.
她见过年轻人浪费他们的聪明才智,将生命如同烟蒂一般不经心地挥掷.
来源:互联网摘选A casual newspaper reader wouldn't like articles on politics everyday.
不经心的报纸读者不会喜欢每天都有政论文章.
来源:互联网摘选Closing a PDA using a catheter is often done on an outpatient basis.
经心导管闭合PDA之后,患者通常不需要住院.
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