A lair can be hollow.Logical formLearned from2 sentences. A lyre can be hollow.Logical formLearned from2 sentences. Pleasantries can be hollow.Logical formLearned from2 sentences. An award can be hollow.Logical formLearned from2 sentences. A hollow face may pertain-to ribs.Logical formLearned from2 sentences. Bolts can be hollow.Logical formLearned from2 sentences. A wand can be hollow.Logical formLearned from2 sentences. A rationalization can be hollow.Logical formLearned from2 sentences. Some hollow (cathode lamp) may be used as a (source lamp).Logical formLearned from2 sentences. A (slab erection) can be hollow.Logical formLearned from2 sentences. (Fiber reactors) can be hollow.Logical formLearned from2 sentences. A (fiber bioreactor system) can be hollow.Logical formLearned from2 sentences. (Hardwood logs) can be hollow.Logical formLearned from2 sentences. A stone may sound hollow.Logical formLearned from2 sentences. A spinal column can be hollow.Logical formLearned from2 sentences.