maintainer例句：
Clinical application of positive pressure transparent space maintainer
压膜式间隙保持器的临床应用
We are a maintainer and builder of the international system.
我们是国际社会秩序的维护者和建设者。
Male sterile line and maintainer line of S~ v type wheat
S~v型小麦雄性不育系及保持系的研究
A study on Breeding Corn Genetic Male Sterile Double Heterozygous Maintainer
玉米基因雄性不育双杂合保持系的选育研究
You are the cause and the maintainer of the three worlds.
你是三个世界的原因和维系者。