At first blush, vaccinating the wolves against rabies seems a simple solution.乍一看来, 为狼群注射防狂犬病疫苗是一种简单的办法.Also vaccinating children against measles has saved many lives.同时包括给儿童接种麻疹疫苗,可以挽救很多生命.Also, vaccinating children mea...
Also vaccinating children against measles has saved many lives.同时包括给儿童接种麻疹疫苗,可以挽救很多生命.Examples are blood testing, debeaking, vaccinating , inseminating, sexing, weighing and movingfrom one location to another.这些例子有血检 、 断...