Along the way, we have never stopped studying, practicing, testing, and improving, and have continuously broken through various "stuck" key technical problems.
Throughout the journey, we have never stopped researching, practicing, experimenting, and improving, constantly breaking through the key technical challenges of various "bottleneck" issues.
Along the way, we have never stopped the pace of research, practice, experiment and improvement, and constantly broke through the key technical problems of "sticking the neck".