A concept can be constituted-of-or-filled-with sustainable development.Logical formLearned from8 sentences. Investments can be sustainable.Logical formLearned from8 sentences. A (development unit) can be sustainable.Logical formLearned from8 sentences. A political system can be sustainable.Logical formLearned from8 sentences. A feedstock can be sustainable.Logical formLearned from8 sentences. A sustainable growth may pertain-to the (world economy).Logical formLearned from8 sentences. A country can be sustainable.Logical formLearned from8 sentences. (Cost savings) can be sustainable.Logical formLearned from8 sentences. A driver can be sustainable.Logical formLearned from8 sentences. Keys can be to sustainable development.Logical formLearned from8 sentences. A (capital structure) can be sustainable.Logical formLearned from8 sentences. A structure can be sustainable.Logical formLearned from8 sentences. Persons may have sustainable growth.Logical formLearned from8 sentences. A national-security strategy can be sustainable.Logical formLearned from8 sentences. A (growth level) can be sustainable.Logical formLearned from8 sentences.