You would really probably have sent a fault back when the operation failed, but I wanted to keep this example simple.

您确实可以在操作失败时返回错误信息，但我只想保持例子的简单性。

youdao

An attempt has been made to delete a registry key, but the operation failed because some subkeys cannot be deleted.

尝试删除一个注册表项，但操作失败，因为有些子项无法被删除。

youdao

The operation failed because the service is not available.

由于服务不可用，操作失败。

youdao

But the operation failed to retrieve the two soldiers.

BBC: Q&A: Gilad Shalit capture

Doug Suttles, chief operating officer of BP's exploration and production division, denied the operation had failed and said the company was trying to figure out a way of providing heat at a depth of 5, 000 feet to melt the crystals.

WSJ: BP's Preparedness for Major Crisis Is Questioned

It also wants more information on which senior Justice Department officials knew about the operation and who approved it, as well as why the various law enforcement agencies allegedly failed to communicate with each other about the operation.

CNN: House committee weighs Holder contempt resolution