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 synchronous

2 to synchronize

3 to keep step with

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

2 age

3 era

4 period

5 classifier: 个 gè

1 one step, one footprint (idiom); steady progress

2 reliable

1 reaching heaven in a single bound (idiom); (esp. with negative: don't expect) instant success

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

1 the one who has retreated 50 steps laughs at the one who has retreated 100 steps (idiom)

2 the pot calls the kettle black

1 to blindly follow suit (idiom)

2 to imitate slavishly

3 to do what everyone else is doing