active immunity

active immunity的音标为["æktɪv ɪmɪˈnɪə]，基本翻译为“主动免疫”。速记技巧可以考虑使用词根记忆法，将active（主动的）和immunity（免疫）结合记忆。

Active Immunity:

英文词源: Active Immunity is derived from the Latin word "activus", meaning "active", and "immunitas", meaning "immunity".

变化形式: The term Active Immunity has remained relatively stable over time, with only minor changes in spelling and pronunciation.

相关单词:

1. Immunity: The main concept related to Active Immunity is immunity, which refers to the state of being immune to a particular disease or condition.

2. Inactive: Another related term is Inactive, which refers to a state or condition that is not actively immunized or active immunity has been lost.

3. Immunize: Immunize refers to the process of providing active immunity through vaccination or other means.

4. Immunoassay: An immunoassay is a method used in chemical analysis that relies on antibodies and antigens to identify and quantify substances in a sample.

5. Immunotherapy: Immunotherapy refers to the use of vaccines or other methods to treat diseases by enhancing the immune system"s ability to fight off infections.

6. Immunomodulator: An immunomodulator is a substance that affects the immune system, either stimulating or suppressing its function.

7. Immunoenhancer: An imunoehancer is a substance that enhances the immune response, typically by increasing the production of antibodies or other immune factors.

8. Immunoenhancing: Immunoenhancing refers to a process or substance that enhances the immune system"s ability to fight off infections or other diseases.

9. Immuno-oncology: Immuno-oncology is a field of medicine that focuses on using the immune system to treat cancer, typically through the use of vaccines or other immunotherapy methods.

10. Immunodeficiency: Immunodeficiency refers to a condition where the immune system is not functioning properly, leading to an increased risk of infections or other diseases.

常用短语：

1. active immunization

2. active immunity

3. passive immunity

4. passive transfer of immunity

5. booster shot

6. immune response

7. immune system

例句：

1. She received an active immunization against the flu virus.

2. The vaccine induced active immunity in the patient.

3. The mother"s passive immunity protected the baby from infection.

4. The booster shot increased the patient"s immune response.

5. The immune system is the body"s defense against disease.

6. Weakened viruses can still elicit an immune response, even in the elderly.

7. The immune system is a complex network of cells and proteins that protect us from disease.

英文小作文：

Active Immunity and the Immune System

Active immunity is a process that involves the production of antibodies by the immune system to protect the body from diseases and infections. The immune system is a complex network of cells and proteins that work together to detect and destroy foreign substances, such as viruses and bacteria, that enter the body. When a virus or bacteria enters the body, immune cells called lymphocytes recognize them and produce antibodies that attach to the foreign substance and prevent it from replicating and spreading to other parts of the body. These antibodies can also be transferred from mother to baby during pregnancy or breastfeeding, providing passive immunity to the baby for a short period of time. However, active immunity is not permanent and may wane over time, which is why booster shots are often necessary to maintain immunity levels. Understanding active immunity and the immune system is crucial for maintaining good health and preventing diseases.