4月2日,我们告别了天宫一号——中国的第一个空间实验室。
On April 2, we said goodbye to Tiangong I, China's first space lab.
大约在同一时间,美国有了自己的空间站,叫做天空实验室号。
At about the same time, the United States had its own space station, called Skylab.
月球的引力是地球引力的六分之一,所以嫦娥四号的实验是一个测试:地球上的植物能知道月球上哪个是向上的方向吗?
The moon's gravity is a sixth as strong as the earth's, so Chang'e-4's experiment was a test: would the earth plants know which way was up on the moon?
Recorded September 9th, 1947, Grace Murray Hopper in case you're interested. This was the lab book of Grace Murray Hopper.
想知道的话大概是在1947年9月9号,记载于,的实验手册中。
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