parasitic infection短语¹⁴⁴⁹⁷²⁺² 基本例句 寄生虫传染病 As nations develop, they improve their population’s access to safe drinking water and to vaccines and medicine— all of which lower parasitic infection rates. 随着国家的发展，改善了其人口的饮用水安全，并为他们提供疫苗和药物，所有这一切都能令传染疾病的发病率降低。 yeeyan