at (some/great etc) length

a) LONG TIMEif you talk at length about something, you talk about it for a long time 长时间地

speak/talk etc at length

The young people spoke at length about their experiences.

年轻人畅谈各自的经历。

We’ve already discussed the subject at great length.

这个话题我们已经讨论了很长时间。

b) literaryAFTER after a long time 长时间后，最后，最终

‘I don’t agree, ’ she said at length.

“我不同意。” 最后她说道。

Examples from the Corpus

at (some/great etc) length• This argument is both diversionary and, at length, immobilizing.• Moreover, they were journalists from a premier worldwide newsgathering organization, playing themselves and at great length in a feature-film fantasy.• The distinctions between kinds of complex idea are considered at some length in the Essay.• An example may, in consequence, be worth considering at some length.• All the torments of the one class and the joys of the other are described at length.• Their objections, based on religious grounds, are discussed at length in the opinion.• The criteria employed for the weeding process are discussed at some length in Chapter 11.• Standing in the farmyard, Giles Aplin also spoke to Seb at some length.

→ at (some/great etc) length at length(4)