A: I have already answered this question at previous conferences.

答：关于这个问题，我在记者会上曾经做过回答。

youdao

Previous ICD revisions were based on annual revision conferences attended by a limited number of selected experts.

以前的ICD修订本以有限的选定专家参加的年度修订会议为基础。

youdao

As I have told you at previous two press conferences, currently, consensuses among the parties are accumulating and differences narrowing.

正如我在前两次发布会上介绍的，目前，会谈中各方的共识在积累，分歧在逐渐缩小。

youdao

Even the EU, leaders at previous climate conferences, are taking fire for refusing to cut emissions further - they're being held back by eastern European nations led by Poland.

BBC: Harrabin's Notes: Broken engagement

Take forward the commitments that were made at previous UN Conferences and summits, in particular the World Conferences on Women in Nairobi and Beijing and the Kuala Lumpur Seminar.

UNESCO: Communication and Information

The conference will build on the spirit and letter of previous DaO intergovernmental conferences (Maputo 2008, Kigali 2009, Hanoi 2010 and Montevideo 2011) to improve the coherence, effectiveness and relevance of the United Nations development system.

UNESCO: Albania to host Conference on Delivering as One