ACabbr.(=alternating current)交流电abbr.(=actinium )元素锕abbr.(=air-conditioning )空气调节Acroart(美) 高密度聚乙烯合成纸

1. Once we set up the acquisitive prescription system, we will estalish the uniform prescription system together with extinctive prescription systems.
   一旦设立取得时效制度，则将与诉讼时效制度构成统一的时效制度。
2. Nowadays, the law of China only regulated the extinctive prescription but without any certain regulations on the acquisitive prescription.
   我国目前只规定了诉讼时效制度，对取得时效制度则没有明确规定。