Decades of working over coal fires in tight, closed spaces with little fresh air (to ensure his dishes would not get cold) had fatally damaged his lungs.

几十年来，他在狭小、封闭的空间里用煤生火，里面几乎没有新鲜空气（以确保他的菜不会变凉），这对他的肺造成了致命的伤害。