(Air pollution) may undergo concentrations.Logical formLearned from18 sentences. Concentrations can be calculated.Logical formLearned from18 sentences. A reduction can be in concentrations.Logical formLearned from18 sentences. Colleges may undergo concentration.Logical formLearned from18 sentences. A (blood alcohol concentration) may pertain-to a male.Logical formLearned from18 sentences. Concentration can be low.Logical formLearned from18 sentences. Students may enroll in concentration.Logical formLearned from18 sentences. Use may undergo concentration.Logical formLearned from18 sentences. (Sediment concentrations) can be high.Logical formLearned from18 sentences. Concentrations can be isotopic.Logical formLearned from18 sentences. Resources may undergo concentration.Logical formLearned from18 sentences. Surfactant may undergo concentration.Logical formLearned from18 sentences. A (water boy) may cause a (concentration camp-jump).Logical formLearned from18 sentences. Number may keep concentration.Logical formLearned from18 sentences. Estradiol may undergo concentrations.Logical formLearned from18 sentences.