insistency

例句：

1. 1. The patient insisted on being treated at home instead of in the hospital.
   病人坚持在家治疗而不是在医院。
2. 2. Despite her best efforts, she couldn't convince him to change his mind.
   尽管她尽了最大努力，但她还是说服不了他改变主意。
3. 3. The scientist persisted in his research for many years without success.
   科学家坚持不懈地研究了多年但没有成功。