parasitic disease短语¹⁴⁴⁹⁷²⁺² 基本例句 寄生物病 Human parasitology teaching needs improvement with variety of parasitic disease infection rate, decrease of teaching time and adjustment of key points. 不同寄生虫病在人群中感染率的变化、课时数的减少、授课重点的相应调整，都需要对以前的教学进行一些改进。 www3.chkd.cnki.net