那时候: at that timeonce there was a timesometime ago
狂妄: wildly arrogant; extremely conceited; frantic; unbridled; wanton; presumptuous 短语和例子狂妄的野心 a wild ambition; 他那时候太狂妄了。 he went beyond the bounds of reason in those days
狂妄自大: (as) proud as lucifer; be arrogant and conceited; ride the high horse; false pride; have grandiose delusion concerning oneself; megalomania; think one is the whole cheese
