他在这个问题公开进行辩论之前就已经表明了自己的立场的翻译：He publicly debated this issue had already demonstrated its position 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

He has shown that its position on this issue in public debate before

He publicly debated this issue had already demonstrated its position

He carries on before publicly the debate in this question on had already indicated own standpoint

He was in the public debate has been shown before in the position of their own

He publicly debated this issue had already demonstrated its position