英语语法分析

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》

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。

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.

该部门将确保新发射的卫星不使用会干扰现有卫星的无线电频率，并将安排新卫星的发射时间。