多名机械设计人员在新世纪经过多年改进的翻译：Number of personnel in the new century, after years of mechanical design improvements 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

More than mechanical design in the new century, after many years of improvement

Number of personnel in the new century, after years of mechanical design improvements

Many machine design personnel experiences many year improvements in the new century

Several mechanical design staff in the new century improvements over the years

Number of personnel in the new century, after years of mechanical design improvements