translation.en: And it's probably the case that this material has washed off the highlands of Titan through these channels that we saw, and has drained over billions of years to fill in low-lying basins.
translation.zh: 大概这就是为何这些物质 冲下土卫六的高地 流下那些我们看过的水道 万年不变的注入低洼的盆地