Tools can be efficient.Logical formLearned from285 sentences. An (energy use) can be efficient.Logical formLearned from284 sentences. A model can be efficient.Logical formLearned from268 sentences. An economy can be efficient.Logical formLearned from265 sentences. An infrastructure can be efficient.Logical formLearned from263 sentences. A support can be efficient.Logical formLearned from262 sentences. Products can be efficient.Logical formLearned from261 sentences. A transportation can be efficient.Logical formLearned from256 sentences. Measures can be efficient.Logical formLearned from255 sentences. Mechanisms can be efficient.Logical formLearned from253 sentences. A strategy can be efficient.Logical formLearned from251 sentences. Ones can be efficient.Logical formLearned from246 sentences. A transfer can be efficient.Logical formLearned from245 sentences. A flow can be efficient.Logical formLearned from241 sentences. A control can be efficient.Logical formLearned from241 sentences.