This has largely been achieved through an evolutionary process of staged improvement.
This has largely been achieved through an evolutionary process of staged improvement.
而这一点，在很大程度上，归功于中国在技术层面上所取得的阶段性进展。
This has largely been achieved through an evolutionary process of staged improvement.
而这一点，在很大程度上，归功于中国在技术层面上所取得的阶段性进展。