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มุม
หักเห
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mum hàk hăy
Obscure
Rare
Everyday
Our take
Safe to skip for now
Noun
angle of refraction
,
angle of deviation
Components
2
มุม
mum
angle
Very common
Learn this early
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หักเห
hàk hăy
to refract
Occasional
Not a priority to learn
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