A (charge ammunition) can be hollow.Logical formLearned from3 sentences. (Brass balls) can be hollow.Logical formLearned from3 sentences. A spire can be hollow.Logical formLearned from3 sentences. A (metal globe) can be hollow.Logical formLearned from3 sentences. An existence may pertain-to the hollow world.Logical formLearned from3 sentences. A dart can be hollow.Logical formLearned from3 sentences. A stone can be hollow.Logical formLearned from3 sentences. Nanoparticles can be hollow.Logical formLearned from3 sentences. A (cathode tube) can be hollow.Logical formLearned from3 sentences. An axle can be hollow.Logical formLearned from3 sentences. (Soda straws) can be hollow.Logical formLearned from3 sentences. Devices can be hollow.Logical formLearned from3 sentences. (Body instruments) can be hollow.Logical formLearned from3 sentences. An ideal can be hollow.Logical formLearned from3 sentences. A (drive shaft) can be hollow.Logical formLearned from3 sentences.