Major illnesses can also arise from earthquakes, from things like burst pipes and poor sanitation.

地震、管道爆裂和卫生条件差等也可能引发重大疾病。

473. People with an active lifestyle are less likely to die early or have a major illness.

拥有积极生活方式的人不太可能早逝或患重大疾病。

Many doctors and researchers believe that loneliness harms the immune system, making us more vulnerable to a range of minor and major illnesses.

许多医生和研究者发现孤独破坏人的免疫系统，使我们容易患大大小小的疾病。

Many doctors and researchers believe that loneness harms the immune system, making us more vulnerable to a range of minor and major illnesses.

许多医生和研究人员认为， 孤独会损害免疫系统， 使我们更容易患上一系列小病和大病。

The thought went that these gross conditions gave rise to miasmas that went on to cause major illnesses like cholera, malaria and the plague (aka Black Death) .

人们认为，这些恶劣的环境会导致瘴气，进而引发霍乱、疟疾和鼠疫(又名黑死病)等重大疾病。