Qiángjiǎo fāxiàn le yīxiē huángfěn, kěnéng shì fěnbǐ huī.
We found some yellow powder in the corner - probably chalk dust.
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usage
Plain 'yellow powder' as a description; in pet/feed contexts it's an abbreviation of 黄粉虫 (mealworm). It also appears as a fragment in compounds: 玉米黄粉 (corn gluten meal), 黄粉病 (rust disease in plants).
