青云翻译

He paced back and forth in the classroom, more experienced trying to select lecture topics.

He paced in the classroom, taking on an apprentice tries to the selected topic.

He back and forth walks slowly and aimlessly in the classroom step, receives the person to attempt to designate the lecture topic.

He was pacing in the classroom, and attempted to selected presentation.

He paced in the classroom, taking on an apprentice tries to the selected topic.