他从主任位置上退了下来。

He vacated his office as Director.

他被禁止担任主任职务。

He is prohibited from being a director.

按照惯例要向主任提交一份报告。

[mass noun]as a matter of routine a report will be sent to the director.

她从营销主任的工作岗位上退了下来。

She retired from her position as marketing director.

两个展览会都是由中心的主任操办的。

Both exhibitions are curated by the Centre's director.