相手 あいて選択 せんたく接続 せつぞく機能 きのうであれば
aitesentakusetsuzoku kinōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 相手選択接続機能

1. If the opponent selection function…; If there were an opponent selection function…

Ba Conditional
Computing