1·It was a costly mistake.
这是一个使我们吃了大亏的错误。
2·His costly mistake resulted in severe loss.
可能造成重大损失的错误。
3·For Nato, this could be a very costly mistake.
对北约来说，这可能是一次代价惨重的错误。
4·But Harris made a costly mistake: He decided to wait.
但哈里斯犯了一个代价不菲的错误：他决定再等一等。
5·They'll realize that the market has changed, and that they made a costly mistake.
他们应该意识到，市场发生了变化，他们犯了代价昂贵的错误。
6·The idea foundered due to a lack of American co-operation - a costly mistake, as it turned out.
英国的这个设想最后不了了之，原因是缺乏美国的合作——后来的结局证明这是个代价昂贵的错误。
7·Applying decorations to a flawed surface can be a costly mistake - and sometimes even a fatal one.
适用于装饰品的表面检测，表面裂纹对于装饰品来说是要付出昂贵的代价，有的时候甚至是致命的。
8·He was really nice about it, even though I had made a costly mistake. He knew, at least, that I had tried my best.
我虽然犯了严重的错误，他仍然没有计较，因他知道我至少已尽了力去做。
9·Developing for a specific vendor's proprietary IaaS could prove to be a costly mistake if the vendor were to go out of business.
事实证明，如果某个供应商可能会停业，那么针对该供应商的专有IaaS进行开发将是一个代价不菲的错误。
10·Fearful of making a costly mistake, I decided to read up on procedures and standards on the federal Office of Personnel Management web page.
害怕犯下会造成重大损失的错误，我决定好好读一下《联邦办公室工作人员管理》网页上面的规程和标准。