经过几十年的不懈努力，中国已经发展到一个新的阶段。
It is through decades of hard work that China has progressed to a new stage.
在第五或第六，他非常成功的部分，并经过长期的不懈努力。
In the fifth or sixth he succeeded very partially, and after long-continued effort.
在第五或第六，他非常成功的部分，并经过长期的不懈努力。
In the fifth or sixth he succeeded very partially, and after long-continued effort.
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