One more BF

qiufeng1990

40. boldface: a chain of the retailer shops close more shops and open some other shops,but (the total profits have risen).……… the profit of the most profitable shop only increased xx% ,but the loss of the closed shop decreased yy% (y>x) , so ( the increase of the total profit is due to the ……）

Any suggestions on each role of BF?

tongxun

1、现象
2、解释或原因