Teacher: Perhaps they were different students and didn't know that those people had already taken the materials, so they gave them the same materials again.
معلم: شاید آنها شاگردان مختلفی بودند و نمی‌‏دانستند که آن افراد قبل از آن مطالب را گرفته‌‏اند، بنابراین دوباره همان مطالب را به آنها دادند.