青云翻译

In order to smoothly complete the teaching objectives, I think teaching is important and difficult are the

To successfully accomplish the target, I think the key and difficult points of teaching are the

In order to smooth achieves the teaching goal, I thought the teaching the key point and the difficulty respectively are

In order to successfully complete the teaching objectives, I think that teaching is the key and difficult points respectively

To successfully accomplish the target, I think the key and difficult points of teaching are the