内行

expert; proficient; skilled; knowledgeable; adept; experienced; insider; professional; connoisseur; specialist

门道

way; method; knack; trick; secret; inside information; knowhow

外行

layman; amateur; nonprofessional; outsider; novice; dabbler; unprofessional; inexperienced; unskilled; nonexpert

看热闹

watch the fun; join in the excitement; spectate; gawk; rubberneck