It described the target as a voluntary action, and predicted it would make a "major contribution" to global efforts to deal with climate change.

VOA: standard.2009.11.26

And nothing else is going to make a significant contribution to it, OK?

并没有什么其他的因素,会对它有明显贡献？

麻省理工公开课 - 热力学与动力学课程节选

And nothing else is going to make a significant contribution to it, OK?

并没有什么其他的因素,会对它有明显贡献？

麻省理工公开课 - 热力学与动力学课程节选