These various courses all seemed insuperably difficult to the student.这些课程对于学生来说好像太难了....

insuperably的音标：insuperably的英式发音音标为：[ɪns'ju:prəblɪ]insuperably的美式发音音标为：[ɪns'juprəblɪ]...

adv.不能取胜地，不能超越地，无法克服地...