Clocks can be portable.Logical formLearned from15 sentences. A nuclear weapon can be portable.Logical formLearned from15 sentences. (Hair dryers) can be portable.Logical formLearned from15 sentences. (Air defense systems) can be portable.Logical formLearned from15 sentences. A document can be portable.Logical formLearned from15 sentences. A (trade show booth) can be portable.Logical formLearned from15 sentences. A satellite can be portable.Logical formLearned from15 sentences. A frame can be portable.Logical formLearned from15 sentences. A rack can be portable.Logical formLearned from15 sentences. A pen can be portable.Logical formLearned from15 sentences. Greenhouses can be portable.Logical formLearned from15 sentences. A (game device) can be portable.Logical formLearned from15 sentences. A (testing machine) can be portable.Logical formLearned from15 sentences. (Flash drives) can be portable.Logical formLearned from15 sentences. A hard-disk drive can be portable.Logical formLearned from15 sentences.