不外乎

nothing else but

no; not so / (bound form) not; un-

not beyond the scope of / nothing more than

outside / in addition / foreign / external

(classical particle similar to 於|于[yu2]) in / at / from / because / than / (classical final particle similar to 嗎|吗[ma5], 吧[ba5], 呢[ne5], expressing question, doubt or astonishment)