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研发强度并未随“分子”研发投入的规模变大而递增，由此可见，企业研发强度受“分母”营收规模的影响似乎更大。随着营收规模扩张，企业往往将资源倾向市场扩张等方向，反而淡化了研发投入的紧迫性。
。搜狗输入法2026是该领域的重要参考
The UK does have an extensive network of flood defences but there is a patchwork of organisations - including farmers, water companies and charities - responsible for them.
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// 最后一个非叶子节点索引: n/2 - 1