[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
充內行
learn from the one who knows how
向內行人學習
When it comes to photography, I'm not an adept.
要說照相， 我不是內行。
He is very expert at repairing TV sets.
他修理電視機很內行。