A (radio system) may operate in a (microwave frequency range).Logical formLearned from4 sentences. A (power spectrum) may pertain-to a (microwave background).Logical formLearned from4 sentences. Microwaves can be passive.Logical formLearned from4 sentences. Some rooms may be equipped with microwave.Logical formLearned from4 sentences. Ripples can be in a cosmic (microwave background).Logical formLearned from4 sentences. A male may open a microwave.Logical formLearned from4 sentences. (Microwave tubes) can be for systems.Logical formLearned from4 sentences. (Microwave circuits) can be passive.Logical formLearned from4 sentences. (Microwave radiometer output voltages) can be passive.Logical formLearned from4 sentences. A range can be constituted-of-or-filled-with (microwave radios).Logical formLearned from4 sentences. (Microwave radios) can be in a continent.Logical formLearned from4 sentences. A (microwave business) may pertain-to persons.Logical formLearned from4 sentences. A (microwave radiometer) can be airborne.Logical formLearned from4 sentences. Rooms may have microwaves.Logical formLearned from4 sentences. A (microwave background) may undergo a discovery.Logical formLearned from4 sentences.