大显身手、大显神通strut one's stuff

大言不惭、夸夸其谈fanfaronade rodomontade

大义凛然inspiring awe by upholding justice

大义灭亲place righteousness above family loyalty

大智若愚Still waters run deep. An empty vessel makes the most sound Still water runs deep

呆若木鸡dumbstruck transfixed

待人接物the ways one gets along with others

殚思极虑rack one's brains

胆小如鼠cannot say boh to a goose

胆战心惊的funky

淡泊明志not seek fame and wealth

道貌岸然be sanctimonious

得过且过drift along muddle along