试题详情
1957年10月4日，Sputnik 1号人造卫星在苏联发射升空并成功环绕地球运行。
On 4th October 1957, the Sputnik 1 satellite by the USSR and successful orbited around the Earth.
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On 4th October 1957, the Sputnik 1 satellite by the USSR and successful orbited around the Earth.