Other suppliers have almost identical goods at the price 10% to 14% cheaper.
别的供应商有和这几乎相同的货,价格便宜10%至14%。
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。