1 surname Ou

1 difference

2 to distinguish

3 to discriminate

4 to make a distinction

5 classifier: 个 gè

1 area

2 region

3 district

1 local

2 regional

3 district (not necessarily formal administrative unit)

4 region

5 area

6 as suffix to city name, means prefecture or county (area administered by a prefecture-level city or county level city)

7 classifier: 个 gè

1 city district

2 urban area

1 One key opens one lock.

2 There is a different solution for each problem. (idiom)

1 lit. fettered by fame and locked up by riches (idiom); tied down by reputation and wealth

2 the victim of one's own success