经过一段时间的太空测试，这颗新卫星已经开始与其他北斗卫星一起工作。
After a period of tests in space, this new satellite has started to work with other Beidou satellites together.
我想知道中国发射上一颗北斗卫星的时间。
最后一颗北斗卫星于今年6月发射升空。
The last satellite of Beidou was sent up into space in June.
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