Then taking that initial draft and rewriting and refining it until it feels right to you.
然后拿着这个最初的草图仔细研究并完善它知道你满意为止。
2
That is done by refining and challenging the scope, deciding to implement a subset of the requirements, enough to fulfill a working part of the initial vision.
这需要完善并挑战需求范围，决定实现需求的一个子集，它足以满足最初设想的愿景的一部分内容。
3
It was divided into 4 stages, which included choosing knowledge source, forming initial knowledge, refining knowledges and confirming knowledge bases.