You take a material like silver and put it in a glass case and that's the definition of a meter.

你拿某种材料,比如银,把它放进玻璃柜里,那是一米的定义

耶鲁公开课 - 基础物理课程节选

I'm going to give you a glass case and in the glass case is an entity with this as one kilogram, by definition.

我给你一个玻璃箱,箱子里放的东西刚好是 1 千克,这是根据定义的

耶鲁公开课 - 基础物理课程节选

He provided in his will that his body be preserved, embalmed, and displayed in the University of London, where he still presides in a glass case with a wax head, dressed in his actual clothing.

他在遗嘱里将自己的遗体捐献给伦敦大学，进行防腐处理，保存，并陈列，他现在还在一个玻璃柜子里,装着用蜡做的头，穿着他自己的衣服。

耶鲁公开课 - 公正课程节选