珠蚌需要洁净的水来生产优质珍珠。
优质珍珠镜下均匀洁净，无色或极淡的黄色。
Good quality pearls are mostly clean, no colors or very weak yellow.
偏光显微镜观察发现优质珍珠和劣质珍珠镜下特征不同。
It is different between good pearls and poor pearls under Optical Microscope.
主要成份：遮瑕因子、熊果苷、透明质酸、优质珍珠粉、氨基酸等。
Main ingredients: concealing factor, arbutin, hyaluronic acid, senior pearl powder and amino acid.
项目：新研发的加拿大优质高粱和珍珠小米杂交良种饲料草的引进和推广，用以提高中国的牛奶和肉类生产。
Profile: Introduction and promotion of Canadian technology of newly developed forage high feed quality sorghum and pearl millet hybrid to enhance milk and meat production in China.
项目：新研发的加拿大优质高粱和珍珠小米杂交良种饲料草的引进和推广，用以提高中国的牛奶和肉类生产。
Profile: Introduction and promotion of Canadian technology of newly developed forage high feed quality sorghum and pearl millet hybrid to enhance milk and meat production in China.
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