寄生虫

jì shēng chóng parasite; drone

发病率

fā bìng lǜ incidence of a disease; disease rate

fā bìng lǜ incidence of a disease; disease rate

国家

guó jiā country; nation; state; CL:個|个[ge4]

排行

pái háng to rank; ranking; seniority (among siblings)

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