She stands up to follow him to the door. 她站起来跟他走到了门口。

　　I went there to stand up to him. 我是为了勇敢地面对他才去的。

　　You stood up to the boss, nobody does that. 你对抗了老板，没人敢那么做。

　　The teacher treated him very unfairly. 老师对他非常不公平。

　　Did he stand up to the teacher? 他顶撞老师了吗？