A material may undergo an addition.Logical formLearned from50 sentences. An addition can be to a skyline.Logical formLearned from50 sentences. An addition can be gradual.Logical formLearned from50 sentences. An unit may undergo an addition.Logical formLearned from50 sentences. (Volume control buttons) may undergo additions.Logical formLearned from50 sentences. An addition can be intriguing.Logical formLearned from50 sentences. Additions can be to a collection.Logical formLearned from50 sentences. Words may undergo an addition.Logical formLearned from50 sentences. A game may undergo an addition.Logical formLearned from50 sentences. A school may undergo an addition.Logical formLearned from49 sentences. A track may undergo an addition.Logical formLearned from49 sentences. Additions can be to a system.Logical formLearned from49 sentences. A floor may undergo an addition.Logical formLearned from49 sentences. A model may undergo an addition.Logical formLearned from49 sentences. Sound may undergo an addition.Logical formLearned from49 sentences.