Jiè tànshuǐ dì yī tiān jiù tóuyūn, zhēn de káng bú zhù.
I got dizzy on day one of cutting carbs — couldn't take it.
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Colloquial fitness/diet shorthand for 碳水化合物 tànshuǐ huàhéwù (carbohydrate). Heard everywhere on Xiaohongshu and at gyms; the full form is for textbooks and food-label nutrition panels.
