obligation to render salvage service

例句：

1. 1. The company has a legal obligation to provide employees with healthcare benefits.
   该公司有法律义务为员工提供医疗保健福利。
2. 2.He felt a strong sense of obligation to help his friend in need.
   他感到有强烈的义务去帮助需要帮助的朋友。
3. 3.She felt a deep sense of obligation to uphold the principles of justice and fairness.
   她感到有深深的义务去维护正义和公平的原则。