The other 5 percent of eggshells consists of a crucial " binding agent" that keeps the chalk from turning into dust and toughens he shells.
蛋壳成分的另外5％是重要的“黏合剂”，可以防止白垩灰化，并增加蛋壳硬度。
The other 5 percent of eggshells consists of a crucial " binding agent" that keeps the chalk from turning into dust and toughens he shells.
蛋壳成分的另外5％是重要的“黏合剂”，可以防止白垩灰化，并增加蛋壳硬度。
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