发行时间：0001.01.01
总页数：2
编辑：
综保科技
摘要：
comment
of saturation model that had seemed so natural early in the nuclear age. fewer than 20 countries currently invest more than 2% of their gross domestic product in research and development, according to data from the organisation for economic co-operation and development and the world bank. in several of those countries, meanwhile, the nature of government support has shifted, often prioritizing projects with short-term goals and practical applications over longer-scale inquiries. when lo...
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