1.vaccine 疫苗
At present, no widely approved vaccine exists for malaria.
目前沒有被廣泛認可的瘧疾疫苗 。
2.mandatory 強制的
The offence carries a mandatory life sentence.
這種罪行依照法律要判無期徒刑 。
3.stipulation 規定
Clifford's only stipulation is that his clients obey his advice.
克里弗德惟一的規定是他的客戶必須聽從自己的建議 。
4.infection 感染
The doctor probed the wound for signs of infection.
醫生檢查傷口是否有感染的跡象 。