relay station

名词 relay station:

1. an amplifier for restoring the strength of a transmitted signal
   同义词：booster, booster amplifier, booster station, relay link, relay transmitter

1. Scientists have set up two kinds of relay stations. One kind is on the earth, the other is a satellite placed in space around the earth.
   科学家们已建立了两种中继站，一种在地球上，而另一种是放在地球周围太空中的卫星上。