1
be in a coma
He has been in a coma for three days.
他已经昏迷三天了。
昏迷；昏迷状态
comas — plural of coma
先理解核心含义，再看它在真实句子里的用法。
昏迷；昏迷状态
a state of deep, often prolonged unconsciousness, usually caused by disease or injury
He has been in a coma for three days.
他已经昏迷三天了。
昏迷,一种可能无法苏醒的无意识状态,通常由创伤引起。
A state of unconsciousness from which one may not wake up, usually induced by some form of trauma.
彗发,彗核周围的一团尘埃。
A cloud of dust surrounding the nucleus of a comet.
深度且常常是长期的无意识状态；通常是疾病或受伤的结果
a state of deep and often prolonged unconsciousness; usually the result of disease or injury
彗差,一种使理想图像中的点变为弥散梨形像的缺陷。
A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.
After the accident, he remained in a coma for several days.
事故发生后，他昏迷了好几天。
The doctors say her coma was caused by a severe infection.
医生说她的昏迷是由严重感染引起的。
Some patients wake up from a coma with only minor memory loss.
有些病人从昏迷中醒来后只有轻微的记忆丧失。
He has been in a coma for three days.
他已经昏迷三天了。
She fell into a coma after the accident.
事故发生后她陷入昏迷。
coma 是可数名词，注意与介词 in 搭配表示状态，用 fall into 表示进入昏迷，用 come out of 表示苏醒。
The patient finally came out of a coma.
病人终于从昏迷中苏醒过来。
Not this
He fell into coma after the accident.
Use this
He fell into a coma after the accident.
coma 是可数名词，表示“昏迷”时需要带冠词；中文不带量词，但英语单数可数名词前必须有 a 或 the，因此要加 a。
Not this
The patient is still coma.
Use this
The patient is still in a coma.
coma 是名词，不能直接作表语；“处于昏迷状态”应用 be in a coma，需要介词 in 和冠词 a，而不是把 coma 当形容词用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
陷入昏迷
After the accident, she slipped into a coma and remained unconscious for weeks.
事故发生后，她陷入昏迷，数周未醒。
从昏迷中苏醒
The doctors were amazed when he came out of a coma without any brain damage.
医生们惊讶地发现他从昏迷中苏醒，而且没有留下任何脑损伤。
处于昏迷状态
He has been in a coma since the surgery.
他自手术后一直处于昏迷状态。
深度昏迷
She was in a deep coma and showed no response to pain.
她处于深度昏迷，对疼痛毫无反应。
医学诱导性昏迷
Doctors put him into a medically induced coma to reduce swelling in his brain.
医生让他进入医学诱导性昏迷，以减轻脑部肿胀。
不可逆昏迷
The patient was declared to be in an irreversible coma.
这名患者被宣布处于不可逆昏迷状态。
Use comas naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
coma 比 comma（逗号）少一个 m：人昏迷时像逗号一样停住不动。
语域：neutral 常见场景：medical reports、news articles、everyday conversation about health 这是一个中性偏正式的医学词，通常用于医疗报道、新闻或个人健康话题；在日常口语中也可使用，但多指较严重的长时间昏迷状态。
与 coma /ˈkoʊmə/ 押韵的词有 aroma、diploma、lymphoma、melanoma，它们的重读元音及之后的部分都是 /oʊmə/。注意拼写相似的 comma /ˈkɑːmə/（双写 m）和 comet /ˈkɑːmɪt/（com- 读作 /kɑːm/）发音不同，不要混淆。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.