### Chinese: 我们隆重庆祝中国共产党成立一百周年，正式宣布全面建成小康社会、实现第一个百年奋斗目标，开启全面建设社会主义现代化国家、向第二个百年奋斗目标进军新征程。
### English: We solemnly celebrated the centenary of the foundation of the Communist Party of China, officially announced the comprehensive construction of the moderately prosperous society, realizing the first one-hundred struggle objective, start comprehensive construction of the great modern socialist country and start the new journey to the second one-hundred struggle objective.
### Errors: There is a minor error at "construction". There is a minor error at "the moderately prosperous". There is a major error at "realizing the first one-hundred struggle objective, start comprehensive construction". There is a major error at "great modern socialist country". There is a major error at "start". There is a major error at "journey to the second one-hundred struggle objective".

### Improved English: We solemnly celebrated the centenary of the foundation of the Communist Party of China, officially announced the comprehensive building of a moderately prosperous society and the realization of the first centennial objective, and we will embark on a new journey of building a modern socialist country in an all-round way and march towards the second centennial objective.