over one's head @ 英語學習筆記

Seb: The test is way to hard. How could the professor treat us like this?
Miah: Don't find excuses for your laziness!
Seb: I can't really memorize things. I think I'm getting old.
Miah: Old? According to a story that I read in the China Post, a 94-year-old Aussie granny just received her master's degree.
Seb: Really? You don't think a 94-year-old person would be over her head when it came to studying the material?
Miah: Her instructors said she had an "amazing brain." Besides, she must be a hard-studying student, unlike you!

解析：over one's head == to be in a situation that is beyond one's abilities (難以應付)
master's degree == 碩士學位
hard-studying student == 用功的學生

really : adv 用來形容 verb (memorize)
laziness : noun 用來當受詞

memorize