A policeman can be efficient.Logical formLearned from10 sentences. A technocrat can be efficient.Logical formLearned from10 sentences. A (bus system) can be efficient.Logical formLearned from10 sentences. A (fuel cell) can be efficient.Logical formLearned from10 sentences. A (jet-engine technology) can be efficient.Logical formLearned from10 sentences. Nuclear warheads can be efficient.Logical formLearned from10 sentences. A person can be efficient at spreading a virus.Logical formLearned from10 sentences. (Computer systems) can be efficient.Logical formLearned from10 sentences. A (file system) can be efficient.Logical formLearned from10 sentences. Ships can be efficient.Logical formLearned from10 sentences. (Transport links) can be efficient.Logical formLearned from10 sentences. A pitcher can be efficient.Logical formLearned from10 sentences. A wing can be efficient.Logical formLearned from10 sentences. A (court system) can be efficient.Logical formLearned from10 sentences. Reductions can be efficient.Logical formLearned from10 sentences.