Returns to scale changes must change with proportion to input, however, the economies of scale only requires the relation among the enlargement of the comparative scale and unit cost.

规模报酬变化要求投入必须同比例变动，相比而言，规模经济只要求比较规模的扩大与单位产品平均成本间的关系。

youdao

Its enablers are the laws of comparative advantage and economies of scale.

而成就他们伟业的正是全球化的制胜法则——比较优势和规模经济。

youdao

It is difficult to put these figures into international context, since few comparative studies on such a scale have taken place elsewhere.

很难把这些数据放到国际环境中去衡量，因为在其他地方几乎没有做过如此规模的比较研究。

youdao

If you want to go down the scale a bit, you can get some comparative bargains among smallish U.S. producers.

FORBES: Where oil is cheap