In a news conference late Tuesday, developing countries demanded rich countries commit to a 40-percent overall cut on emissions.

VOA: standard.2009.11.04

Remember your task for this week-- a dozen of you have already read it-- it's to commit- above and beyond what you usually commit- five extra acts of kindness during one day.

记得你们这周的任务-,一些同学已经知道-,就是去做超越以往所做的事情-,一天内多做五件好事。

哈佛公开课 - 幸福课课程节选

In his first Washington address since assuming NATO leadership last month, Secretary-General Rasmussen said he understands America's desire to see its NATO allies commit more troops and resources to Afghanistan.

VOA: standard.2009.09.29