科学家们半年前就开始致力于这个研究的翻译：Scientists began six months ago to the study 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

Scientists began six months ago, dedicated to this study

Scientists began six months ago to the study

The scientist half year ago starts to devote to this research

Scientists have just six months ago started working on this research

Scientists began six months ago to the study