台Taivo A Taiwan Mandarin dictionary

光速

guāngsù

ㄍㄨㄤ ㄙㄨˋ

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  1. 1the speed of light
  2. 2(fig.) extremely quickly
Example

光速比音速快很多。

guāngsù bǐ yīnsù kuài hěn duō

The speed of light is much greater than that of sound.

Keep 光速 and it comes back until you know it.

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