1
a benign/malignant tumor
benign 意为“良性的”，malignant 意为“恶性的”，用于区分肿瘤是否癌变。
The biopsy showed that the tumor was benign.
活检显示这个肿瘤是良性的。
肿瘤；肿块
tumors — plural of tumor
先理解核心含义，再看它在真实句子里的用法。
肿瘤；肿块
a mass of tissue that grows abnormally in the body and has no useful purpose
The biopsy showed that the tumor was benign.
活检显示这个肿瘤是良性的。
无功能的异常新生组织块
an abnormal new mass of tissue that serves no purpose
The doctor found a small tumor in the scan.
医生在扫描中发现了一个小肿瘤。
The tumor grew slowly, so she did not feel any pain at first.
肿瘤长得缓慢，所以她起初没有感到任何疼痛。
After the operation, the doctors said the tumor had been completely removed.
手术后，医生说肿瘤已被完全切除。
benign 意为“良性的”，malignant 意为“恶性的”，用于区分肿瘤是否癌变。
The biopsy showed that the tumor was benign.
活检显示这个肿瘤是良性的。
表达肿瘤位置时，体内器官常用 in，体表部位也可用 on。
They found a tumor in his lung.
他们发现他的肺里有一个肿瘤。
remove 指手术切除，口语中也可用 take out。
The surgeon removed the tumor successfully.
外科医生成功地切除了肿瘤。
tumor 是可数名词，常用 a tumor 或 tumors。
She was diagnosed with a brain tumor last year.
她去年被诊断出脑部肿瘤。
Not this
He has tumor.
Use this
He has a tumor.
tumor 是可数名词，单数形式前需要加冠词 a；中文没有冠词概念，所以容易漏掉。
Not this
My body has a tumor.
Use this
I have a tumor.
英语表达患病时通常以人作主语（I have...），而不是像中文那样说“我的身体有…”。改用 I 作主语更自然。
Not this
He has many tumor.
Use this
He has many tumors.
many 后接可数名词复数，tumor 的复数是 tumors；中文名词没有复数变化，容易忘记加 -s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
良性肿瘤
The doctor said it was a benign tumor and no treatment was needed.
医生说这是良性肿瘤，不需要治疗。
恶性肿瘤
A malignant tumor can spread to other parts of the body.
恶性肿瘤可能扩散到身体其他部位。
脑肿瘤
He was diagnosed with a brain tumor last year.
他去年被诊断出脑肿瘤。
肿瘤生长
Smoking may speed up tumor growth.
吸烟可能会加速肿瘤生长。
肿瘤细胞
The drug targets tumor cells without harming healthy ones.
这种药物针对肿瘤细胞，不伤害健康细胞。
切除肿瘤
Surgeons successfully removed the tumor.
外科医生成功切除了肿瘤。
这不是肿瘤。（电影《幼儿园特警》中阿诺德·施瓦辛格的经典台词）
The biopsy confirmed that the tumor was benign.
活检证实这个肿瘤是良性的。
Use tumors naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
tumor 发音像“突冒”：想象身体里突然冒出一块多余的肿块，就是 tumor。
语域：neutral 常见场景：医疗报告、医患对话、健康新闻 通常为中性词，既用于医学专业讨论，也常见于日常对话和新闻报道，指体内异常增生的组织块。
这些词与 tumor 押韵：重读音节均为 /uːmɚ/ 结尾（humor 在 /uː/ 前带 /j/，仍算押韵）。注意拼写相似不代表读音相同：favor /ˈfeɪvɚ/、actor /ˈæktɚ/ 等 -or 结尾词不押韵，tutor /ˈtuːtɚ/ 的结尾是 /tɚ/ 而非 /mɚ/。
Dictionary facts from ECDICT, WIKTIONARY.