enter for与enter的区别?

enter和enter for都有报名参加的意思.但是关键是侧重点不一样.
1.enter侧重于参加考试.eg.enter an examination
2.enter (sb) for sth 侧重于参加竞赛.eg.I've entered for the high jump.
说实话,enter和enter for没什么大区别.