教授走进教室时，我们正兴致勃勃地讨论中东的形势。

We were caught up in a discussion about the situation in the Middle East when the professor walked into the classroom.

youdao

教授走进教室时，我们正兴致勃勃地讨论中东的形势。

We were caught up in a discussion about the situation in the Middle East when the professor walked into the classroom.

youdao