他们正在做一个有关英语学习方法的调查的翻译：They are doing a survey on English learning methods 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

They are doing an investigation of methods for learning English

They are doing a survey on English learning methods

正在翻译，请等待...

They are doing what they did a survey of the English language learning methods

They are doing a survey on English learning methods