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.

葡萄柚含有大量的維C，但是科研人員還無法證實在感冒時，人體僅靠食物就能獲得足量的維C來對抗感冒。但是，葡萄柚富含一種天然的具有增強免疫力的化合物，類黃酮。如果不喜歡葡萄柚，可以試試桔子或橘子。

來源:可可英語 http://www.ccdyzl.cn/read/201011/119159.shtml