The problem with this method is that methane and nitrous oxide emissions fluctuate strongly in time and space.
这种方法的问题是，甲烷和一氧化氮的排放量在不同时间和空间波动很大。
2
The problem is that these stable orbits would only exist once you have crossed the threshold of the event horizon, where time and space flow into one another.
问题是，只有曾穿过黑洞视界的临界才会存在稳定轨道，那里时间与空间会流入其他地方。
3
It will have a lifespan of about 15 years, enough time to make a significant dent in our space debris problem.