靠近地球的9号探测器和其他俄罗斯着陆器所看到的岩石图，暗示了一段痛苦的火山历史，这一点在上世纪90年代初得到了美国麦哲伦轨道飞行器的证实。
The rocky views glimpsed by the Nearer Nine and other Russian landers suggested a tortured volcanic history that was confirmed in the early 1990s by the American Magellan orbiter.
过去，美国的人造卫星曾在控制下相会，或者是与其他飞行器对接。
In the past, US satellites have been commanded to approach and dock with other spacecraft.
事实上，在美国和其它任何地方都为各种轻型娱乐用飞行器制订了各种各样的规定。
Indeed, there are all kinds of rules in America and elsewhere for various forms of lightweight recreational aircraft.
应用推荐