行
háng
I m.
row; column; line of print
每页有二十五行。 There are twenty-five lines on a page.
II b.f.
1) firm; shop; business (银行)
2) line of business
你是干哪一行的？ What's your line?
3) order of seniority in a family
我在我们家行二。 I'm second among my brothers and sisters.
4) expertise in a certain field (内行, 外行)