active immunity      
noun [ U ]  medicine specialized uk/ˌæk.tɪv ɪˈmjuː.nɪ.ti/ us/ˌæk.tɪv ɪˈmjuː.ə.t̬i/
 (身体的)自动免疫(性),主动免疫(性)
the situation in which the body produces its own antibodies (= substances in the blood that fight disease) 
 
英汉双解词典收录81607条英汉双解翻译词条,基本涵盖了全部常用单词的读音、翻译及用法,是英语学习的有利工具。