职能

例句：

1. 1. The manager has acrucial role in the company's success.
   经理在公司的成功中扮演着关键角色。
2. 2. The doctor is responsible for diagnosing and treating patients.
   医生负责诊断和治疗病人。
3. 3. The engineer must fulfill hisfunctional requirements to ensure the project'ssuccess.
   工程师必须满足其功能要求，以确保项目的顺利进行。