心脏病是全世界主要的死亡原因之一。

Heart ___disease is a leading cause of death worldwide.

政府正在努力防止这种疾病的传播。

The government is working to prevent the spread of the ___disease.

贫困常常导致卫生条件差，增加患病风险。

Poverty often leads to poor sanitation and increased risk of ___disease.