通过提高库存管理水平可以大大降低成本。

Through raising stock management level can greatly reduce cost.

youdao

新机器的运转速度将提高一倍，因而会大大降低成本。

The new machines will work twice as fast, thus greatly reducing costs.

youdao

由于低廉的低价和劳动力，在中国装配可大大降低成本。

Because of the cheap land and Labour, assembling in China will greatly reduce the cost.

youdao

So, the optimal thing to do if you live in a world like this n is to get n as large possible and you can reduce the standard deviation of the portfolio very much and there's no cost in terms of expected return.

如果现实中也这样简单的话,那么你就尽量增大,这样就能让投资组合的标准差,就会大大降低,从预期收益率的角度来看,这样做的成本是零。

耶鲁公开课 - 金融市场课程节选