1.The sprawling dark region near picture center is Syrtis Major, with the whitish Hellas impact basin just below, in the southern hemisphere.
影像中央绵延的暗色区域是西尔蒂斯大平原，它下方位在南半球的淡色区块则是希拉斯撞击盆地。
2.Below the comet-chasing spacecraft lies a dark boundary along the martian Syrtis region.
在这艘追逐彗星的飞船下方，沿着火星的流沙地区有一道暗色的边界。
3.No canals are visible(! ), but large surface markings such as the dramatic, dark Syrtis Major are easily identified.
没有运河可见！但是大的火星地标很容易认出来，例如令人印象深刻的暗的大瑟提斯高原。