Assistant Director-General for Health Security and Environment at the World Health Organization, Dr.Keiji Fukuda, urged people to practice good hygiene, including washing their hands and covering their mouth when they cough, and if they become sick to stay home.

VOA: standard.2009.04.29

You get sick and then you die, suggesting that sleeping is good to keep you healthy.

而是慢慢地生病死去，这表明睡眠对保持健康非常重要。

耶鲁公开课 - 心理学导论课程节选

You could have good humours and you could have bad humours and if those humours, whatever they are, got out of balance then you got sick if you had too many bad ones compared to good ones.

你可以有正常的体液,也可以有异常的体液,如果这些体液,不管体液究竟为何物,当体液失衡,你就会生病,即在异常体液比正常体液多时就会生病

耶鲁公开课 - 生物医学工程探索课程节选