报错示例：拉镜像时提示 credential helper 不存在。
The “PCM Boundary”: a Wannabe-DRM Graveyard
。WPS官方版本下载对此有专业解读
「是我要求愛潑斯坦提供飛機的，」她說。
Jacqui Gabb, Professor of Sociology and Intimacy at The Open University, assessed this in her Enduring Love project, published in the journal Sociology in 2015.