So, here's magnesium. It's very light.

我们回到原题，这是镁，它很轻。

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One is to use light-weight materials, such as aluminum and magnesium.

一种就是使用轻型材料，例如铝和镁。

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A glass bulb filled with finely shredded aluminum or magnesium foil that is ignited by electricity to produce a short-duration high-intensity light flash for taking photographs.

闪光泡一种内部装有铝箔或镁箔的精细碎片的玻璃灯泡，用电点燃以发出短暂的高强度闪光，从而拍摄照片。

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So, here's magnesium. It's very light.

我们回到原题，这是镁，它很轻。

麻省理工公开课 - 固态化学导论课程节选

Printed electronics require conductors to create light or energy and that usually happens with calcium, magnesium or lithium.

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