Plasmodium is a protozoan which causes malaria; it is the causative agent of the disease . 疟原虫是引起疟疾的原生动物;是疾病的病原体。
In unsuccessful transmission experiments the causative agent could not be passed through bacteria-retaining filters . 在失败的传染实验中,致病因子不能通过细菌滤器。
Within a few years the causative organisms of typhoid, asiatic cholera and many other diseases were grown in pure culture . 在几年的时间内,人们培养出了伤寒、亚洲霍乱和其他疾病的线细菌。
causative agent : candida, a type of yeast fungus 病原:念珠菌霉菌真菌之一种
Dictionary-form causative-form verb forms please try 日本语能力试验1级词汇