英语翻译They usually find that the formulation of good research

They (主)usually find(谓) that(后面全是宾从句) the formulation of good research question(从句主语 is (从句系表胃语)a much more subtle and frustrating task(从句宾语) than(后面的部分与前从句宾语比较 )is(被动式) generally believed (与is成被动)by those(被动式里的动作者) who have not actually attempted it(动作者的定语从句).
直译:
他们常常发现:好的研究问题的制定比那些实际上并没有尝试的人所普遍认为的要精细和困难得多.
翻译:他们常发现:好的研究课题的形成,并不象那些没有实际尝试的人普遍所想的那样,它实际上要精细和困难得多.

They usually find that the formulation of good research question 是宾语从句 做整个句子的主语。