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Grapefruit
葡萄柚
Grapefruits have a good amount of vitamin C. But science has yet to prove that you can easily get enough vitamin C through foods alone, without supplementation, to help treat cold and flu. However, grapefruit is packed with flavonoids -- natural chemical compounds that have been found to increase immune system activation. Dislike grapefruits? Try oranges or tangerines.
葡萄柚含有大量的维C，但是科研人员还无法证实在感冒时，人体仅靠食物就能获得足量的维C来对抗感冒。但是，葡萄柚富含一种天然的具有增强免疫力的化合物，类黄酮。如果不喜欢葡萄柚，可以试试桔子或橘子。
