VOA慢速英语:Rio + 20 Brings Attention to Sustainable Development

短语讲解：

1. United Nations Secretary-General Ban Ki-moon spoke at the opening of the event, known as the Rio + 20.

known as 被认为是,被称为
例句：The resultant defect is known as chromatic aberration. 
由此而产生的缺陷叫做色差。 

2. This year, officials are trying to reach final agreement on a document that details goals for reducing poverty while supporting clean energy and sustainable development.

try to 努力做某事
例句：He finally screwed up enough courage to try to dive. 
他终于鼓足了勇气试着跳水。

3. It notes that food security, water, oceans and dealing with disasters are other issues basic to lifting people out of poverty.

deal with 与...交涉,交易;应付;处理
例句：He has learnt to deal properly with all kinds of complicated situations.
他已学会恰当地应付各种复杂局面。

4. The Mayor of New York City, Michael Bloomberg, took part in a discussion among mayors of some of the world’s largest cities.

take part in 参加
例句：Are you going to take part in the first experiment?
你们会参与首次实验吗?