get to know your local supermarkets, compare the prices and selection, and if you have any questions, ask the clerk at the checkout counter.
结识您当地的超级市场,比较价格和选择,如果您有任何疑问,请秘书在结帐柜台。
as the popular chinese saying goes, one should compare the prices at various suppliers before buying something. you should visit more shops to select the best commodity.
意思是买东西的时候,应该多走走,多看看,再选择一个最好的。
if the net weights of the two items are the same, compare the prices to determine the cheapest.
如果两件商品的凈重是一样的,通过比较价格来确定最便宜的。