Последние новости
WTI原油涨3.05%，报67.200美元/桶；布伦特原油涨2.94%，报72.920美元/桶。
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One lunar day is equivalent to four weeks on Earth, made up of two weeks of continual sunshine and two weeks of darkness. That makes relying on solar power very challenging.
How did Nasa's Suni and Butch fill nine months in space?