Some people are unwilling to attend the classes partly because of the cost involved.

有些人不愿来上课，部分原因是所需的费用问题。

《牛津词典》

When you do come, the tutor recommends bringing a small recorder with you just so you can listen again later, and the cost for five classes is currently 40 pounds.

如果你真的来上课，导师建议你带一个小录音机过来，这样之后你就能重新再听录音了，还有目前五节课的学费是40英镑。

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Once you've stabilized which filters and classes to include, there's a negligible cost for running FindBugs, with the additional benefit that it detects new bugs.

一旦确定了加入哪些过滤器和类，运行FindBugs就没什么成本了，而带来的好处就是它会检测出新缺陷。

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Despite MYCAA and Federal Pell grant funding, she and her husband eventually had to dip into their savings to pay for the full cost of classes.

WHITEHOUSE: The White House

But diversified asset classes cost more to trade and involve higher management fees, expenses that eat into pension-fund returns.

ECONOMIST: Spreading the risk has spread the losses

This in turn means that the cost is paid mainly by the middle and working classes, since the cost of health insurance for them is generally at the same cost (or close to it) as it is for CEOs.

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