by比较好,通过……方式.through不太好.
如：through prep.(1)从……通过,穿过e.g.The River Thames flows through London.泰晤士河流经伦敦.比较：across是从平面或表面穿过,如across the street,而along 是沿着……走.(2)在……中,一直到e.g.She nursed me through my long illness.我病了很长时间,她都一直护理着我.(3)经历,经受e.g.He was...