是nopainnogain还是nopainsnogains?我学的是nopainnogain但是看到好多地方是nopainsnogains?哪个是对的呢..还是都可以.

　　是nopainnogain还是nopainsnogains?

　　我学的是nopainnogain

　　但是看到好多地方是nopainsnogains?

　　哪个是对的呢..

　　还是都可以.