item of duty

例句：

1. 1. The captain's job is to ensure the safety ofall on board.
   船长的职责是确保船上所有人的安全。
2. 2. Each member of the team hasa specific role in the project.
   每个团队成员在项目中都有特定角色。
3. 3. Themanager is responsible for overseeing the daily operations of thecompany.
   经理负责监督公司的日常工作。