The Queqiao satellite will form a communication bridge between controllers on Earth and the far side of the Moon.

鹊桥卫星将在地球的控制器和月球背面之间形成一座通信桥梁。

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Because the moon's body blocks direct radio communication with a probe, China first had to put a satellite in orbit above the moon in a spot where it could send signals to the spacecraft and to Earth.

由于月球阻碍了与探测器的直接无线电通信，中国首先必须把一颗人造卫星送入月球轨道上的一个点，人造卫星可以从那里向航天器和地球发射信号。

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India launched a satellite into moon orbit in 2008, but had to abandon it nearly a year later after communication links snapped and scientists lost control of it.

印度在2008年将一颗卫星发射至月球轨道，不过在一年后，由于卫星通讯突然中断，科学家失去了对其控制而不得不将之抛弃。

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Satellites beyond Earth use radio waves for tracking and communication, but the moon satellite is the only one to rely on lasers for tracking, NASA said.

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