2021—2025 年度，中国企业研发投入的区间分布保持稳定，延续了以亿元和千万元级企业为“腰部力量”、百亿元以上和千万元及以下企业作为“首”“尾”两端的基本态势。腰部区间覆盖了最大比例的企业数量，构成了研发梯队的中坚部分。
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В США подняли дюжину самолетов по тревоге из-за приближения российских Ту‑14208:43。关于这个话题，体育直播提供了深入分析