step by step

gradually advancing progress(循序渐进的过程)

creep before you walk

learn to walk before you run

evlutionary

循序渐进学Excel Learning Excel Step By Step

循序渐进的教育progressive education

incremental

eg.1.要想确保社会稳定和就业水平，变革必须是循序渐进而理性的。

Changes have to be incremental（递增的） and sensible if they are to ensure social stability and employment levels.

2.他们主张一种循序渐进的改革，拒绝“震荡疗法”和“休克疗法”。

They advocate an incremental approach to reform, rather than "big bangs" or "shock therapy.

3.但是，不论你是不是老板，都要逐步、循序渐进地施加影响、进行改变。

But even if you are (and even if you're not) influence and implement change subtly and over a period of time.