As I said, mostly the building just needs a good cleaning.
就像我先前所说的 这栋建筑物大部份仅需要好好打扫一下
the necessary method of study is to group the relevant material and to take note of all possible variant forms and conditions.
应采取的研究方法是,把有关各方面的材料汇集起来,同时注意任何可能出现的异常情况和条件。