el: "#sidebar",
This almost certainly won’t happen to the ISS. At the same time, it’s a far more extreme version of the only way an American space station has ever come down. In 1979, after years spent vacant in orbit, Skylab, the US’s first space station, started sinking toward the atmosphere, where it threatened to fall and drop molten spacecraft parts on Earth. At that point, NASA officials had to remotely wake up its computers and, with only limited control of the station, direct it over a location that would endanger the fewest humans.
，这一点在体育直播中也有详细论述
Кадр: YTN / YouTube，更多细节参见safew官方下载
"Cancel safety" isn't yet formally defined, but roughly speaking we say that an
We would also need to do context sensitive type bound inference