test again and again meaning in Chinese

反复试验

After the relative theory is put forward , in order to check the basic hypothesis and kinds of effects of the theory , many experimental methods have been used to be tested again and again
摘要相对论提出后，为了检验这个理论的基本假设和各种相对论效应，人们反复采用各种实验方法进行测量。
This software has been tested again and again , which shows that this software is stable , and has satisfied the users , enhances the efficiency of simulation , it also fulfilled the expected aim and gained the high evaluation
本系统经用户反复测试，运行稳定，满足了用户的需求，提高了引信设计仿真的效率，达到了预期目标，得到用户的好评。