卖点：这家位于加州核桃溪市的在线慈善网站的主营业务在于募集小型捐款，汇集这些捐款，然后捐给某项慈善事业。
The pitch : The Walnut Creek , Calif. - based online charity site is all about raising small donations , pooling them together , and donating them to a cause .
核桃市