从研发投入规模区间分布情况看，中国已经形成一个由头部企业主导、庞大腰部力量支撑、众多小微企业补充的多层次协作的创新生态。
Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.，更多细节参见夫子
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4.1 496. 下一个更大元素 I
Paul Glynn and Helen BushbyCulture reporters。业内人士推荐同城约会作为进阶阅读
With rare exceptions, phones are pretty boring these days. The good news is, a boatload of those rare exceptions are about to show up at once, courtesy of Mobile World Congress.