wèile / fángzhǐ / jīwēn / kuòsàn / gōngzuòrényuán / duì / jīshè / jìnxíng / le / chèdǐ / xiāodú为了防止鸡瘟扩散,工作人员对鸡舍进行了彻底消毒。To prevent the chicken disease from spreading, the staff thoroughly disinfected the chicken coop.