This reached $ 796m in the last quadrennium , but could nearly double this time around due to the Beijing organising committee \'s success in attracting sponsorship from Chinese companies and multinationals keen to lift sales in the vast Chinese market .

在前一个4年期间，此类赞助达到7.96亿美元，但这次的数额可能增加了近一倍，因为北京奥组委成功吸引了中国企业和热切希望在广阔中国市场提高销售额的跨国公司前来赞助。

But to explain where this money comes from and where is it spent we need to go back to the last completed Olympic four-year period , or quadrennium .

但要说明这些钱来自何处，又花在哪里，我们需要回顾一下上一次奥运的四年。