A presentation can be abstract.Logical formLearned from2 sentences. A humanitarianism can be abstract.Logical formLearned from2 sentences. A budget can be abstract.Logical formLearned from2 sentences. A (container structure) can be abstract.Logical formLearned from2 sentences. A darts can be abstract.Logical formLearned from2 sentences. An abstract class may define an object.Logical formLearned from2 sentences. A (root class) can be abstract.Logical formLearned from2 sentences. An abstract (syntax tree) can be from (source code).Logical formLearned from2 sentences. An abstract class can be for (time zone information objects).Logical formLearned from2 sentences. A (base class compiler.ast) can be abstract.Logical formLearned from2 sentences. A (class async_chat) can be abstract.Logical formLearned from2 sentences. A baseclass can be abstract.Logical formLearned from2 sentences. Structures can be abstract.Logical formLearned from2 sentences. (Security models) can be abstract.Logical formLearned from2 sentences. (Programming patterns) can be abstract.Logical formLearned from2 sentences.