大部分救援工作是有志愿者担当的。
对于他们来说没有志愿者的帮助，做一对一的工作几乎不可能。
It's impossible for them to do their work one-to-one without the help of volunteers.
首先感谢所有志愿者对于促进开放式课程计画运动所做的贡献。
We thank all volunteers in advance for their contribution to the growing OpenCourseWare Movement.
首先感谢所有志愿者对于促进开放式课程计画运动所做的贡献。
We thank all volunteers in advance for their contribution to the growing OpenCourseWare Movement.
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