Even setting aside the unproven hints of ancient oceans, the extent of the outflow channels suggests that a huge total volume of water existed on Mars in the past.
即使不考虑未经证实的古代海洋迹象，流出渠道的范围表明，过去火星上存在着大量的水资源。
2
As elevation increases, narrow, deep channels of water form throughout the marsh.
随着海拔的升高，沼泽中形成了又窄又深的水渠。
3
The channels lead the water into large tanks where it can be stored.