1. To speak or write at great length on a subject; expatiate.
   详述:就一个话题详细地说或写;详述
2. They disputed at great length what they should do.
   他们对应该做什么这一问题进行了长时间的争论。
3. He described his journey at full length.
   他详细地介绍了他的旅程。
4. She described the agreement at full length.
   她详细地描述这个协议。
5. That is a portrait at length.
   那是一张全身画像。

　2个副词解释