后来成为坦普尔·伍德勋爵(Lord Templewood)的霍尔在1954年的回忆录中提到的这次招募；但是马特·兰德在仔细翻阅霍尔的文件时，才意外地首次发现支付的细节。
Hoare, later to become Lord Templewood, mentioned the recruitment in memoirs in 1954, but Martland stumbled on details of the payments for the first time while scouring Hoare's papers.
在经过好几年的刻苦研究和讨论以后，NASA的科学家已经将他们一开始的50多个登陆点削减到了4个，它们分别是：埃伯斯·沃德环形山、霍尔登环形山、马沃斯山谷以及盖尔环形山。
After several years of painstaking research and debate, NASA scientists whittled down their initial list of over 50 sites to four - Eberswalde Crater, Holden Crater, Mawrth Vallis, and Gale Crater.
在经过好几年的刻苦研究和讨论以后，NASA的科学家已经将他们一开始的50多个登陆点削减到了4个，它们分别是：埃伯斯·沃德环形山、霍尔登环形山、马沃斯山谷以及盖尔环形山。
After several years of painstaking research and debate, NASA scientists whittled down their initial list of over 50 sites to four — Eberswalde Crater, Holden Crater, Mawrth Vallis, and Gale Crater.
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