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antigen + stimulates / triggers + immune response
The antigen stimulates the production of antibodies.
这种抗原刺激抗体的产生。
能刺激免疫反应（尤其是产生抗体）的物质
先理解核心含义，再看它在真实句子里的用法。
能刺激免疫反应（尤其是产生抗体）的物质
a substance that stimulates an immune response, especially the production of antibodies
The antigen stimulates the production of antibodies.
这种抗原刺激抗体的产生。
诱导免疫应答的物质,通常为外来(非自身),但并非总是如此。
A substance that induces an immune response, usually foreign (nonself) but not always so.
The immune system produces antibodies to fight each antigen.
免疫系统产生抗体来对抗每种抗原。
Vaccines contain a weakened form of the antigen to train the body's defenses.
疫苗含有弱化形式的抗原，以训练身体的防御系统。
Scientists identified the antigen responsible for the allergic reaction.
科学家确定了引起过敏反应的抗原。
The antigen stimulates the production of antibodies.
这种抗原刺激抗体的产生。
Scientists detect the antigen in blood samples.
科学家在血液样本中检测到这种抗原。
The antigen is present on the surface of the virus.
该抗原存在于病毒表面。
Not this
The antigen attacks the virus.
Use this
The antibody attacks the virus.
混淆了抗原和抗体的概念。抗原是刺激免疫反应产生的物质，抗体才是直接攻击病原体的蛋白质。因此应使用 antibody。
Not this
The body produces many antigen.
Use this
The body produces many antigens.
Antigen为可数名词，复数形式为antigens，此处需加-s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
特异性抗原
The immune system recognizes a specific antigen.
免疫系统识别特异性抗原。
病毒抗原
Viral antigens trigger an immune response.
病毒抗原触发免疫反应。
抗原检测
Rapid antigen tests are widely used for screening.
快速抗原检测广泛用于筛查。
抗原呈递
Antigen presentation is crucial for T-cell activation.
抗原呈递对T细胞激活至关重要。
抗原抗体反应
The antigen-antibody reaction is highly specific.
抗原抗体反应具有高度特异性。
抗原受体
B cells express antigen receptors on their surface.
B细胞在其表面表达抗原受体。
Use antigen naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆：抗原是触发免疫反应的'导火索'，抗体是后续的'灭火器'。
语域：formal 常见场景：医学、免疫学 该词是专业术语，通常用于医学、免疫学等正式科学文献中。
Usually used in medical or immunological contexts.
Dictionary facts from ECDICT, WIKTIONARY.