A: Could you give me some advice on buying stocks?
B: Sorry, but that's out of my line.
B: Sorry, but that's out of my line.
That's not my major area. 그건 내 전공이 아니야.
What is your special talent? 당신의 특기는 뭐죠?
That's my specialty.
That's right up [down] my alley. 그것이 내 십팔 번이야.
