A classic example of such a mistake is adding error handling code to take care of NULL Pointers or bad references without looking into the real cause of the invalid references.

此类错误的典型示例是添加错误处理代码以处理NULL指针或错误的引用，却没有查出无效引用的真正原因。

youdao

The real alternate source may provide valid IDs, invalid IDs, or no IDs.

实际的备用源可能提供有效的ID、无效的ID、或者不提供ID。

youdao

There is nothing special about this name, it is just one of a myriad of invalid domain names which never intersect with any real name.

这个名字没有什么特别的，它仅仅是一个许多无效的域名中的一个代表与任何真实的名字，永远不会相交。

youdao

Standard psychiatric diagnoses are notoriously invalid - they do not correspond to meaningful clusters of symptoms in the real world, despite the obvious importance that they should.

BBC: 'Grief and anxiety are not mental illnesses'