1 to substitute

2 to act on behalf of others

3 to replace

4 generation

5 dynasty

6 age

7 period

8 (historical) era

9 (geological) eon

1 representative

2 delegate

3 classifier: 位 wèi

4 classifier: 个 gè

5 classifier: 名 míng

6 to represent

7 to stand for

8 on behalf of

9 in the name of

1 surname Yuan

2 the Yuan or Mongol dynasty (1279-1368)

1 surname Gu

1 a decade of a century (e.g. the Sixties)

2 age

3 era

4 period

5 classifier: 个 gè

1 a new year begins (idiom)

1 a single slip may cause everlasting sorrow (idiom)

1 passed on from generation to generation (idiom); to hand down

1 unchanging since times immemorial (idiom)

2 unalterable

3 unvarying

4 monotonous

1 the men of today are sadly degenerated (idiom)