英文中正反方的表达

the Proposition :正方
the Opposition ：反方

first speaker of the Proposition:正方第一位发言人
。
。
（以此类推）
first speaker of the the Opposition：反方第一位发言人
。
。
（以此类推）
members of the opposing team：对方成员

fellow有自己队友的意思

对方辩友是fellow debaters
Or you can call exactly like "the first debater of proposition" or "the second debater of oppposition" ...

We don't confuse fellow debaters with members of the same side, because we call them "partners".

By using the word "fellow", I think we can make a friendly atmosphere in which the debate can be carried out pleasantly, without aggressive arguement involved.

obverse debater and reverse debater
意思是正方辩友和反方辩友，用于英语辩论赛中。
debater是辩友，参加辩论的人。
辩论赛正反方各四人，因此常说debaters.