The trouble with this statistic is that America has lots of sources of R&D spending: federal money accounted for only $86 billion of the $288 billion that it spent on R&D in 2004.
不过这个数据有问题，因为美国研发支出的资金来源很多，比如2004年，研发总支出为$2880亿，而财政支出不过$860亿。
The trouble with this statistic is that America has lots of sources of R&D spending: federal money accounted for only $86 billion of the $288 billion that it spent on R&D in 2004.
不过这个数据有问题，因为美国研发支出的资金来源很多，比如2004年，研发总支出为$2880亿，而财政支出不过$860亿。
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