The classroom stands empty during the holiday.在假期中教室都空着。The schoolgirls giggled when the famous football player walked into their classroom.当这个著名的足球运动员走进教室时,女生们都咯咯地笑起来.It was hot and stuffy in the classroom.教室里很闷热。Accord...
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...