上学期我们对他们的饮食习惯做了调查的翻译：Last term we had done to their eating habits survey 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

Their last semester we did a survey of eating habits

Last term we had done to their eating habits survey

On the semester we have made the investigation to their diet custom

We have to rank their eating habits to do the investigation

Last term we had done to their eating habits survey