英语翻译:当我们正在听课时,他却发出声音.

问题描述:

英语翻译:当我们正在听课时,他却发出声音.

We were in class ,while he made a sound(这里的while表对比)

当我们正在听课时,他却发出声音.
【While we were listening to lesson, he uttered his voice 或者 he made a sound】