Some metals may be found in concentrations.Logical formLearned from5 sentences. An (ammonia nitrogen concentration) can be effluent.Logical formLearned from5 sentences. Insecticides may undergo concentration.Logical formLearned from5 sentences. A necessity can be for concentration.Logical formLearned from5 sentences. Concentrations can be potent.Logical formLearned from5 sentences. (Protein concentrations) can be crude.Logical formLearned from5 sentences. (Stress concentrations) can be localized.Logical formLearned from5 sentences. Human population may undergo concentrations.Logical formLearned from5 sentences. (Concentration areas) may pertain-to persons.Logical formLearned from5 sentences. (Concentration camps) may undergo an establishment.Logical formLearned from5 sentences. A curriculum can be for concentration.Logical formLearned from5 sentences. Archaeological sites may undergo concentration.Logical formLearned from5 sentences. Concentration may pertain-to a show.Logical formLearned from5 sentences. Students may be admitted to concentration.Logical formLearned from5 sentences. Public buildings may undergo concentration.Logical formLearned from5 sentences.