infestation的复数形式为：infestations...

Piperazine citrate is the drug of choice in the treatment of Ascaris infestations.枸橼酸哌嗪治疗蛔虫感染是最好的药物.These pigs had acquired lungworm infestations presumably containing masked influenza virus under natural conditions.这些猪在...

infestations的音标：...