The research result was adopted by the department concerned.

此研究结果已被市有关部门采用。

Please decide the purchasing time with the department concerned.

请与有关部门确定购买电脑的时间.

Enclosed herewith is my score report form the department concerned.

附上各科成绩的报告单.

The department concerned is making a thorough investigation into the incident.

有关部门正在深入考试大调查这事件。

Write a letter to the department concerned, asking them to help find a candidate.

写一封信给相关的部门， 要求他们帮助找到一个候选人。