But these haze particles, it was surmised, before we got there with Cassini, over billions and billions of years, gently drifted down to the surface and coated the surface in a thick organic sludge.
但这些雾气的存在不过是推测 在卡西尼探测的数亿年前 这些雾气悬浮于地表后附着其上 形成有机污垢