Yulmi Rock,a middle-aged worker who came to the rally with other members of his family says many who have come to the United States are professionals who just want to work for this country and make a contribution.

VOA: standard.2010.03.21

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