Inflammatory bowel disease (IBD), which affects as many as 1 million Americans, refers to two chronic diseases that cause inflammation of the intestines: Crohn's disease and ulcerative colitis.

影响着一百万多美国人的炎症性肠病，是指能引起肠部炎症的两种慢性病：克罗恩氏病和溃疡性结肠炎。

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Let's say you eat two slices of bread and then a slice of fruit. The slice of fruit is ready to go straight through the stomach into the intestines, but it is prevented from doing so.

如果你吃两片面包，然后吃一片水果，这片水果将通过胃径直进入你的肠，但应防止这样做。

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Crohn's disease and colitis, two similar diseases in which a person's immune system violently attacks the lining of the intestines, may be more common now than in the days before sanitation and effective drugs because there aren't enough intestinal worms to keep immune systems busy.

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