Фото: Serhii Korovainyi / Reuters
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拉长时间线来看，有披露研发人员的企业数量从2021 年度的3895 家增至2025 年度的5309 家，五年间增长36.30%，增幅高于入库企业总数变动（20.81%）。随着这一增长，有披露研发人员的企业占比呈逐年攀升的态势，从66.60%增至75.15%。
Mostly. This is because, theoretically, we could still save the ISS and move it into higher orbit. NASA has calculated that propelling the station more than 640 kilometers above Earth would keep it alive for 100 years—and also require at least 18.9 metric tons of propellant. That’s roughly 2,000 airline carry-ons. A thousand years would require at least 36 metric tons. If that doesn’t seem like very much, consider the fact that, right now, no vehicle can transport that amount of gas to the station. The still-in-development SpaceX megarocket Starship might be able to haul a significant percentage, but it would struggle to dock with the station, according to the space agency’s estimations.，更多细节参见雷电模拟器官方版本下载