Subhealth is a state between healthiness and disease.是什么意思？

Subhealth is a state between healthiness and disease.

亚健康状态是一种介于健康和疾病之间的状态.

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

state

n. 国家，州，状况，情况，资

例句
Danny returned to Father's house in a state of intense agitation...
丹尼回到神父的房子时显得极为焦虑不安。

between

prep. 在…之间，私下，暗中，在…中任择其一，来往于…之间；adv. 当中，中间；

例句
How big is the abyss between what you think you are and what you actually are?
你对自己的认识和真实的你之间差别到底有多大？

healthiness

n. 健康，健全；

例句
Subhealth is a state between healthiness and disease.
亚健康状态是一种介于健康和疾病之间的状态.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

disease

n. 疾病，弊端，不安；vt. 传染，使…有病；

例句
In many cases the disease will clear up of its own accord.
这种病很多情况下会自愈。