It implies that the biological mechanisms underlying Alzheimer's disease may be very different in racial groups.

这意味着阿尔茨海默氏症的生物学机制在不同种族群体中可能是非常不同的。

If it is secondary to some other disease, then usually treatment starts by treating the underlying disease.

如果它继发于一些其他疾病，通常先治疗原发病。

Fever is usually accompanied by other symptoms as well, which may guide the diagnosis of underlying disease.

发烧通常还伴有其他症状，这可能会指导潜在疾病的诊断。

Management of underlying diseases that might be affecting thyroid activity like corticosteroids or prednisone to control inflammation may be helpful.

治疗管理会影响甲状腺活跃度的潜在疾病，比如用强的松等糖皮质激素控制炎症，可能有效。

The former are not symptomatic of an underlying disease, injury, or condition; they are the condition.

前者不是潜在疾病、伤害或状况的症状；他们是条件。

Wang Guiqiang with the Peking University First Hospital says COVID patients who die of underlying diseases are not counted in COVID death stats.

北京大学第一医院的王贵强表示，感染新冠后因基础病导致的死亡不归类为新冠死亡病例。

And while symptoms are usually mild, factors like age, immunocompromised states, and underlying respiratory diseases can result in much more drastic, and sometimes even more complicated, life-threatening symptoms.

尽管症状通常较轻，但诸多因素如年龄、免疫功能低下的状态以及潜在的呼吸系统疾病等可能导致更严重的症状，有时甚至是更复杂的、能威胁生命的症状。

When cardiomyopathy develops as a way to compensate for some other underlying disease like hypertension or valve diseases, it's called secondary cardiomyopathy, but when it develops all by itself, it's called a primary cardiomyopathy.

当心肌病的产生是由于心脏为了代偿其他潜在疾病时，比如说高血压或者心瓣膜疾病，它就叫做继发性心肌病，但如果它的致病原因在心脏自身时，则称为原发性心肌病。

A definitive diagnosis can be made with PCR testing of cultures from nasal secretions or washings, but this is typically only done in more complex cases, like if an individual is immunocompromised or has an underlying respiratory disease.

通过对鼻腔分泌物或洗液的培养物进行PCR检测，可做出最终诊断，但这通常只在处理复杂病例时才用到，例如患者存在免疫缺陷或患有潜在呼吸道疾病时。