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.
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。
And optics require high-precision lenses with tight tolerance: Light is not a forgiving medium – think how even a slight ripple is noticeable in a glass.
和光学要求高精度镜头公差：光不是一个宽容的媒体 - 想怎么连一个微小的波动是明显的，在一个玻璃。
With a slight shiver, the Prime Minister got up and moved over to the window, looking out at the thin mist that was pressing itself against the glass.
首相微微打了个寒战，站起来走到窗户前，望着外面紧贴窗玻璃的薄薄的雾气。
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