margins

n.边际；[医]缘

名词margin的复数形式

But there are limits to this strategy, in as much as margins on undifferentiated production have proved low. 但是这样也有局限性，那些没有什么差别的产品上面的边际效益也是很低的。

Store productivity is declining, sales per square foot are falling and profit margins are shrinking. 店铺生产率不断下降，每平方英尺销售量在下跌，边际利润在萎缩。