A vast scope of theoretical studies and experiments have to be made, testing methods and equipment to be devised.

他们做了大量的理论研究与实验，设计了各种测试方法和仪器。

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But most of these methods is expensive to testing equipment and complex sensing control system and computer processing system, some methods to also have certain difficulties.

但这些方法大都需要昂贵的检测设备和复杂的传感控制系统和计算机处理系统，有些方法研究起来也有一定的困难。

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Gas Testing Personnel must also be fully trained to understand the test methods, the equipment and the procedures for monitoring throughout the complete duration of the work.

气体检测人员也必须接受全部培训以掌握检测方法、设备使用和作业期间全程监测的程序。

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While the job involves working with much higher voltage levels and different methods of testing equipment, he says he felt prepared for the role.

WSJ: Transitioning From the Military to Civilian Work