Very few projects offer the general public a chance to volunteer in improving the sum of human knowledge in such a significant way.
很少有项目了能以这样一种有效的方式为大众提供担当志愿者的机会，让他们来改善人类的总体知识。
2
I volunteer because I feel it is part of being a human being.
我做志愿者是因为我觉得这是做一个人的一部分。
3
Take some time during the holidays to volunteer your time to a good cause, and in doing so not only give of yourself, but open yourself up to these fellow human beings.