Typically, modeling starts with an informal session in which you collect the basic definitions and the most simple relationships in the model.

一般来说，建模从一次非正式的会话开始，期间可以收集到模型中基本的定义和最简单的关系。

youdao

The 2008 action plan was discussed by the WHO Executive Board at its 122nd session in January 2008, and during an informal consultation with Member States, held in Geneva on 29 February 2008.

世卫组织执行委员会在2008年1月举行的第122届会议上并在2008年2月29日于日内瓦举行的与会员国非正式磋商期间，讨论了2008年行动计划。

youdao

The evening would be a very informal and a happy affair with lots of food, drinks and karaoke. The next morning there would be a full session between the Ministers and the private sector.

会议的第一天晚上是一个很随意而快乐的酒会，吃的喝的唱的全部使出来，第二天上午，则是部长们与私营行业的正式会议。

youdao

The New York meeting co-chaired by President Obama, British Prime Minister Gordon Brown and Pakistani President Asif Ali Zardari was the first summit-level session of the informal Friends of Democratic Pakistan grouping, and it brought together leaders of some 25 countries and organizations.

VOA: standard.2009.09.24

Simon Coveney, Ireland's agriculture minister, called for the informal session in Brussels, Belgium, inviting the EU Health Commissioner Tonio Borg and ministers from other European Union nations.

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Ministers and officials will be coming to Brussels fresh from an informal two-day session at UN climate convention headquarters in Bonn, where they've heard United Nations Environment Programme chief scientist Joseph Alcamo outline a few key issues.

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Like the Center for Security Policy's first Roundtable on the Future of the Manned Bomber Force, this session suggested an informal consensus: The United States cannot afford to effect the draconian reductions in long-range bomber capabilities envisioned by the Clinton defense plan.

CENTERFORSECURITYPOLICY: Center For Security Policy