healthy是形容词，health是名词。名词是词性的一种，也是实词的一种，是指待人、物、事、时、地、情感、概念等实体或抽象事物的词。名词可以独立成句。在短语或句子中通常可以用代词来替代。
health例句
1.A person's health improves with the avoidance of stress.
一个人只要避免紧张，健康状况就会改善。
2.We regard health as inversely related to social class.
我们认为健康状况与社会地位成相反关系。
3.Health care must be at the service of all who need it.
医疗保健机构必须为所有需要者提供服务。
4.The new legislation concerns health and safety at work.
这项新法规涉及工作场所的健康与安全。
5.A fundamental change in the organization of health services was required.
公共医疗在组织上需要有一个根本性的变革。
