If an individual develops problems with a particular gene that applies to the heart, then any resultant disease will strike at that individual's heart, but have no effect on the stomach.
一個人如果某種基因發生問題，這個基因剛好是在心臟開著、發生作用的基因，那麼他的心臟就會產生疾病，對沒有用到該基因的胃則沒有影響。