这位技术人员校准了研究实验室里的显微镜。

The ___technician calibrated the microscopes in the research lab.

一名熟练的技术人员在医疗中心操作了核磁共振机。

A skilled ___technician operated the MRI machine at the medical center.

灯光技术人员确保所有片场设备都运行正常。

The lighting ___technician ensured all the film set equipment functioned properly.