However, buyers are concerned about affordability. Redfin found that home prices in the U.S. were up 1.1% in January compared to the same period last year, selling for a median price of $422,980. According to Realtor, homes are staying on the market longer compared to a year ago.
但真正的问题是，理想模型往往建立在需求高峰与利用率饱和的假设之上。而真实世界中的利用率，从来不会长期维持在高位。
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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heLLoword翻译官方下载
19:57, 27 февраля 2026Мир，更多细节参见WPS下载最新地址