absence of heart

例句：

1. 1.He was so sad that he felt like his heart was missing.
   他非常伤心，感觉他的心好像缺失了。
2. 2.She needed to be with her family more than ever before, but her absence of heart made it difficult for her.
   她需要比以往任何时候都更亲近家人，但她的缺乏心让她很难做到。
3. 3. The teacher noticed the student's lack of heart and decided to help him improve.
   老师注意到了学生的缺乏心，决定帮助他提高。