One of the most important functions of materials（）is to establish the relationship between a material or a device’s properties and performance and the microstructure of that material, its composition, and the way the material or the device was synthesized

One of the most important functions of materials（）is to establish the relationship between a material or a device’s properties and performance and the microstructure of that material, its composition, and the way the material or the device was synthesized and processed.
正确答案：scientists and engineers