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Located at the NASA Research Center in Iowa is a 5,000-gallon vat of water, and inside the tank is an underwater treadmill designed by Dava Newman, an aerospace engineer.
在在爱荷华美国国家航空航天局研究中心有一大桶5000加仑的水，在水槽内有一个水下跑步机，由Dava Newman，一个航空工程师设计。
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For four years Newman observed scuba divers as they simulated walking on the Moon and on Mars on her underwater moving belt.
四年来，Newman观察了水肺潜水员们，他们在她的水下移动带上模拟在月球和火星上行走。（四年来，当水肺潜水员们在她设计的水下移动带上模拟月球和火星上行走时，Newman观察了他们。）
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She wanted to discover how the gravity of the Moon and of Mars would affect human movement.
她想要发现月球和火星的重力是如何影响人体运动的。
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To do this, Newman attached weights to the divers and then lowered them into the tank and onto the treadmill.
为此，Newman附加了重量在潜水员身上并且把他们下放到水箱中的跑步机上。
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These weights were carefully adjusted so that the divers could experience underwater the gravity of the Moon and of Mars as they walked on the treadmill.
这些重量是仔细校准过的，所以潜水员们能够在水下体验月球和火星的重力，当他们行走在跑步机上时。（所以当他们走在跑步机上时，潜水员们能够在水下体验月球和火星的重力）。
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Newman concluded that walking on Mars will probably be easier than walking on the Moon.
Newman推断行走在火星上可能会比行走在月球上容易些。
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The Moon has less gravity than Mars does, so at lunar gravity, the divers struggled to keep their balance and walked awkwardly.
月球比火星重力小，所以在月球的重力下，潜水员们要尽力保持他们的平衡并且步履蹒跚。
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But at Martian gravity, the divers had greater traction and stability and could easily adjust to a pace of 1.5 miles per hour.
但在火星的重力下，潜水员们有较大的抓地力和稳定性并且能够轻松适应1.5英里每小时的步速。
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As Newman gradually increased the speed of the treadmill, the divers took longer, graceful strides until they comfortably settled into an even quicker pace.
当Newman逐渐增加跑步机速度的时候，潜水员们使用长一些，优雅的步伐，直到他们舒服的适应了一个甚至更快的步速。
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Newman also noted that at Martian gravity, the divers needed less oxygen. The data Newman collected will help in the future design of Martian space suits.
Newman也注意到在火星的重力下，潜水员需要较少的氧气。被Newman收集的数据将会在未来有助于火星宇航服的设计。
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Compared to lunar space suits, Martian space suits will require smaller air tanks; and, to allow for freer movement, the elbow and knee areas of the space suits will also be altered.
同月球的宇航服相比，火星的宇航服将会要求小一些的空气箱，并且，允许更加自由的运动，宇航服肘部和区域也将被改变。