สีคืออะไร และเกี่ยวข้องกับคลื่นแสงอย่างไร
B2 Thai listening practice · Standard Thai · Curated for upper-intermediate learners
A 3:06 video in Thai at B2 level, suitable for upper-intermediate learners. The speech is at a natural pace around 179 words per minute, rated 4.3/5, medium listening difficulty by Reelang’s algorithm.
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