1
be asymptomatic
主语通常指人，表示某人虽患病但未表现出症状。
Many infected people are asymptomatic.
许多感染者没有症状。
无症状的
先理解核心含义，再看它在真实句子里的用法。
无症状的
having no symptoms of illness or disease
Many infected people are asymptomatic.
许多感染者没有症状。
不表现任何疾病症状的,如亚临床病例(体格检查或实验室检查无可见体征)。
Not exhibiting any symptoms of disease, as for example in a case which is subclinical (“without signs detectable by physical examination or laboratory test”).
无症状的
having no symptoms of illness or disease
Many people with the virus are asymptomatic and never feel sick.
许多感染这种病毒的人没有症状，从不会感到不适。
The test can detect the disease even in asymptomatic patients.
这种检测即使在无症状患者身上也能发现疾病。
She remained asymptomatic throughout the entire incubation period.
整个潜伏期间她始终没有出现症状。
主语通常指人，表示某人虽患病但未表现出症状。
Many infected people are asymptomatic.
许多感染者没有症状。
强调在一段时间内持续没有症状。
She remained asymptomatic throughout the quarantine.
整个隔离期间她一直无症状。
用作定语时放在名词前，常搭配 patient、carrier、infection 等词。
Asymptomatic patients can still spread the virus.
无症状患者仍可能传播病毒。
Not this
She is a asymptomatic carrier of the virus.
Use this
She is an asymptomatic carrier of the virus.
asymptomatic 的读音以元音音素 /eɪ/ 开头，不定冠词要用 an，而不是根据字母 a 误用 a。冠词选择看发音，不看拼写。
Not this
He has asymptomatic after being infected.
Use this
He is asymptomatic after being infected.
asymptomatic 是形容词，表示“无症状的”，只能在 be 动词后作表语，不能作 have 的宾语。把 have 改为 be，句子才符合英语语法。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
无症状携带者
Some people are asymptomatic carriers of the virus and can still spread it.
有些人是这种病毒的无症状携带者，仍然可能传播病毒。
无症状感染
She had an asymptomatic infection and only learned about it after a blood test.
她有过一次无症状感染，直到验血后才知道。
无症状病例
The clinic identified several asymptomatic cases during routine screening.
这家诊所在常规筛查中发现了几例无症状病例。
无症状患者
Doctors advised the asymptomatic patient to quarantine until the test came back negative.
医生建议这位无症状患者隔离，直到检测结果转为阴性。
无症状传播
Public health officials warned that asymptomatic transmission makes the disease difficult to trace.
公共卫生官员警告说，无症状传播使这种疾病难以追踪。
Use asymptomatic naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 asymptomatic 拆成 a（无）+ symptom（症状），联想体检报告上的“无症状”：没有 symptom，就是 asymptomatic。
语域：formal 常见场景：medical reports、public health announcements、clinical research asymptomatic 属于医学术语，多用于正式场合，如医疗记录、公共卫生报道或临床研究。日常口语中更常说 without symptoms 或 show no symptoms。注意它是形容词，可作表语或定语。
以上词都以 /ˈmætɪk/ 结尾，与 asymptomatic 的结尾押韵，拼写中也都有 -matic。注意不要被拼写相似的 asymptotic /ˌæsɪmpˈtɒtɪk/ 迷惑，它重音在 /ˈtɒt/，与 asymptomatic 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.