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 ancient times

2 olden times

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

2 age

3 era

4 period

5 classifier: 个 gè

1 to raise

2 to increase

3 to improve

1 lit. to fight it out with sb to see who is best (idiom)

2 fig. to cross swords with

3 to lock horns

1 can't recognize tall or short (idiom); doesn't know what's what

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

1 to feel unconcerned and let matters rest (idiom)

1 man seeks his way up just as water seeks its way down (idiom)

2 one should constantly strive to make progress