求翻译lime addition followed by sedimentation followed by filtration,不太理解这句话的意思

先加入石灰,然后让其沉淀,最后过滤.这种结构：A followed by B followed by C ,意思就是,先A,再B,最后是C应该学过一个句子：The teacher came into our classroom followed by the boy.你可以想象的出,是老师先进教...