The grey antagonistic system, for instance the grey military struggle system is a much complicated system.

灰色对抗系统 ，是一个全新的领域并具有重要的研究价值 如灰色军事对抗系统是更为复杂的模糊系统 。

youdao

There's a whole class of antagonistic drugs that have been designed to influence your cardiovascular system.

现有一大类的拮抗剂类药物,全部是设计作用于心血管系统的

耶鲁公开课 - 生物医学工程探索课程节选