英英释义
n.immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
中文释义
n.牛痘苗；疫苗
例句
Doctors worried that there would not be enough vaccine for everyone who needed it.
医生担心没有足够的疫苗给每个需要的人。
There is no vaccine against HIV infection.
现在还没有防艾滋病病毒传染的疫苗。
Anti-malarial vaccines are now undergoing trials.
抗疟疾的疫苗正在试验阶段。
