点击下方单词,选择对的这个单词
1. 疫苗:symptom 症状 | vaccinum 疫苗 | inoculate 接种
noun
1. immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
Synonym: vaccine
多通过句子记忆单词,而不是单独死记硬背。