The rocket launched two communications satellites.
火箭发射了两颗通信卫星。
《柯林斯英汉双解大词典》
2
If the ground stations tracking the satellites are not accurate to the millimeter, then the satellites cannot be accurate either.
如果跟踪卫星的地面站位置不能精确到毫米，那么卫星也是不可能精确的。
3
The department will make sure that newly launched satellites don't use radio frequencies that would interfere with existing satellites,and schedule when such new satellites can be launched.