Along the way, we have never stopped our efforts in research, practice, testing, and improvement, and have continued to break through various "stuck" key technical problems.
Throughout the journey, we have never stopped our efforts in research, practice, experimentation, and improvement, constantly breaking through the key technical challenges of various "bottlenecks".
Along the way, we have never stopped our efforts in research, practice, experiment and improvement, and constantly broke through various key technical problems that are "stuck in the neck".