He's a ruthless businessman, as I know to my cost.

我吃了苦头后才知道他是个无情的商人。

《牛津词典》

Besides, it ties up my money. All this adds to my cost.

开这样大数额的信用证，费用很大，再说资金也要积压，这些都要使成本增加。

youdao

He is a ruthless businessman, as I know to my cost.

他是一个心狠手辣的商人，我是付出了代价才知道这一点的。

youdao

Let me finish the picture here; here's my demand curve, here's my constant marginal cost at c, and I want to use this picture on the left now to figure out what the monopoly quantity is.

先把图画完,这条是需求曲线,这个是边际成本常量c,下面我们通过左边的图像,来找出垄断产量

耶鲁公开课 - 博弈论课程节选

Therefore, I would think about spreading the risk that is, selling a call likely to be out of the money against this as to offset my total cost and allow me to have some upside if the stock moves up in the meantime.

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My second goal was to make sure that my repellent was cost effective so that it would be accessible to a global population.

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The few internships I found were across the country and would have required me to relocate at my personal cost.

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