I went off to the stack and found some really good material for my part, but when I got back to our table, they were just goofing off and talking.

于是我动身走去那堆书那里，并找到了很多对我这部分来说很有用的材料。但是当我回到我们的桌子旁时，他们只是在那儿聊天、消磨时间。