I. key [kiː] 名词
单语范例（未经PONS编辑处理）
It's the closest thing to the skeleton key of the digital world.
www.pcmag.com Such items include mushrooms, skeleton keys, treasure chests, and others.
en.wikipedia.org However, warded keys were designed to fit only a matching lock and the skeleton key would often fit many.
en.wikipedia.org Porky sees him and comes in the store using a skeleton key.
en.wikipedia.org By contrast, the agency of the nocturnal city is a skeleton key to past, present and futures.
www.citymetric.com