1. 得到：gainable 可得到的 | gained 得到 | gainer 得利者

2. 得到/增进/获得/获利：gaine /盒子/ | gained /得到/增进/获得/获利/ | gainer /获得者/得利者/胜利者/

3. 级长怎样获得权力：Moste?Potente?Potions?强力药剂? | Prefects?Who?Gained?Power?级长怎样获得权力? | Invisible?Book?of?Invisibility?隐形术的隐形书?