当他两个半小时后回来时，他们还在同一个地方，继续就同一个话题进行着同样的谈话。

When he comes back two and a half hours later, they're still staying in the same place, continuing the same conversation on the same topic.

youdao

我看完文卷，从来只打下分数，不写批语，而注重在和每个人做半小时以内的课外谈话上。

I only put marks but never give comments on the papers after reading them. Instead I lay emphasis on holding outside-class individual talks with them lasting not more than 30 minutes.

youdao