这些年来，科学家们一直致力于改善环境的研究。的翻译：Over the years, scientists have been working to improve the environment of research. 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

Over the years, scientists have been committed to improving the environment.

Over the years, scientists have been working to improve the environment of research.

These years, the scientists devote continuously to the improvement environment research.

Over the years, scientists have been working to improve the research environment.

Over the years, scientists have been working to improve the environment of research.