Definition: If you talk about something at length, you talk for a long time. Level: C2
我们详细讨论了这两个话题。
We discussed both topics ___at ___length.
我们详细讨论了安排，以确保涵盖每一个细节。
We discussed the arrangements ___at ___length to ensure every detail was covered.
作者在引言中详细阐述了历史背景。
The author elaborates ___at ___length on the historical context in the introduction.
