在飞向水星的路上，信使号已经成功拍摄到大部分水手十号遗漏的地区，只有大约百分之五的地区是不可见的。
On the way to Mercury, Messenger managed to make pictures of much of what Mariner 10 missed, leaving only about 5 per cent of the planet unseen.
信使号是第一艘环绕水星轨道的飞船，自从1974 - 75年的水手号以来。
MESSENGER is the first spacecraft to orbit Mercury since Mariner 10 in 1974-75.
过去水手10号已绘出了45%的水星表面，而信使号的3次飞经填补了余下的空缺，如今已能呈现出一张如实完整的地图。
Mariner 10 managed to map about 45% of Mercury's surface as it sped past, but Messenger's three fly-bys have filled in the gaps, and there is now a virtually complete map of the place.
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