additive action造句

• Before now most of the research has concentrated on the action of single compounds against organisms . when two or more chemicals are applied simultaneously to a living system or unit , the combined effect may be one of the followings : additive action , antagonism and synergism
  目前，有关污染物的生物效应研究多数还是集中在单个化合物的生物效应，随着多种污染物(包括重金属)进入水域环境后，所发生的联合毒性效应往往表现为相加、拮抗或增毒作用。