你怎么背对着我呢，金老师？

You turning your back on me too, teacher kim?

那么长的课文，我又没学，怎么背啊？

How could I recite a LONG LONG text without learning it?

这节课教你们怎么背东西的，这是教你如何思考的。

This is not about how you memorize things, it's about how you think.

可是，不管在家里怎么背得滚瓜烂熟，只要一上舞台，我的脑子里就成了一片空白。

But no matter how easily I delivered them at home, as soon as I stepped onstage, every word disappeared from my head.

怎么一直背对我们？

Why do you turn your back on us?

怎么一直背对着我说话。

Talking back at me all the time.

可惜，他没有告诉我们长矛具体是怎么钩在背上的。

Unfortunately, so far, he doesn't describe exactly how the lance was hooked onto the back.

你怎么了？我背疼。

What's the matter with you?