食品包装 food packaging ( food packing , food package )真空包装 vacuum packing充气包装 gas flush packaging ( gas packing )无菌包装 aseptic packaging ( aseptic packing )营养素 nutrient蛋白质 protein粗蛋白质 crude protein植物蛋白 vegetable protein动物蛋白 animal protein蛋白质营养学评价 nutritional evaluation蛋白质变性 protein denaturation蛋白质互补 complementary action of protein氨基酸 amino acid必需氨基酸 essential amino acid脂肪 fat (oil and fat)粗脂肪 crude fat脂肪酸 fatty acid饱和脂肪酸 saturated fatty acid不饱和脂肪酸 unsaturated fa