They are engaged in a heated discussion.

他们正在进行热烈的讨论。

This question set off a heated discussion.

这个问题引起了热烈的讨论。

They had a heated discussion at the meeting.

他们在会上进行了热烈的讨论。

They had a heated discussion among themselves.

他们之间进行了热烈的讨论。

This policy has given rise to a heated discussion.

这项政策引起了广泛的热议。