step it

step it STEP It is the first step that cost [shake it and step up]的意思? Step Up (I'M On It) 歌词 step It was important to step up measures ahead of the autum great-step-forward什么意思?原句It was a great-step-forward for man 英语改错：first of all do things step by step it is no good to li step up to do or doing?please explain it It seems easy to learn Japanese at the first step. It is the first step that is diffcult to take it is quite a short step to do是