[nèi háng]
expert; adept; specialist; proficient; expert in; professionals; one who knows how; people who know the ropes; turn oneself into experts; an old hand at sth.
pose as an expert
充内行
learn from the one who knows how
向内行人学习
When it comes to photography, I'm not an adept.
要说照相， 我不是内行。
He is very expert at repairing TV sets.
他修理电视机很内行。