1 surname Bu

1 sudden

2 abrupt

3 unexpected

1 initial

2 preliminary

3 tentative

1 synchronous

2 to synchronize

3 to keep step with

1 stage

2 degree (to which a situation has evolved)

3 situation

4 leeway

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 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

1 to go on foot (idiom)

2 to do things at a leisurely pace