从它第一次作为商品在19世纪70年代出售以来，这130多年灯泡一直都是由玻璃和灯丝构成，只在尺寸和形状方面经历了一些微小的变化。
From its first commercial development in the late 1870s, on through some slight tweaks to size and shape, the bulb has been a glass-and-filament mainstay for more than 130 years.
为了达到这样的效果，小组改变了光通过玻璃方式，是通过制造了个毫米尺寸的单片玻璃空间变向转换器。
To do so, the team altered the way light passes through glass by creating millimeter-sized devices called monolithic glass space-variant converters.
准备一件物品，为的是可以做出所需尺寸的圆形面饼。玻璃杯就可以。
Take any object which allows to make pastry circles of the necessary size. A glass will do fine.
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