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N a US space station launched in May 1973 into an orbit inclined at 50° to the equatorial plane at a mean altitude of 430 kilometres (270 miles), the astronauts working there under conditions of zero gravity. It disintegrated, unmanned, in 1979, with some parts landing in the outback of Australia 太空实验室; 美国于1973年发射
On the TV screen the sky lab could be seen orbiting round the earth in outer space.
在电视屏幕上，人们可以看到那个空间实验室在外层空是轨道上绕地球运行。
An order has been given that the researchers who are now in the sky lab should be sent back.
已有命令下达，要求将现在在航天实验室里的研究人员送回来。
The objective of the Sky Lab Mission was to study a person's ability to live and work for extended periods in the weightless conditions of space.
“天空实验室计划”的目的是，研究一个人在太空中的失重状态下长时间生活和工作的能力。
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