(Stress levels) can be perceived.Logical formLearned from7 sentences. A (combat stress reaction) can be acute.Logical formLearned from7 sentences. Stress can be on soldiers.Logical formLearned from7 sentences. Stress can be on a fact.Logical formLearned from7 sentences. Indices can be constituted-of-or-filled-with stress.Logical formLearned from7 sentences. Systems can be under stress.Logical formLearned from7 sentences. Stress can be safe.Logical formLearned from7 sentences. Stress may pertain-to a controversy.Logical formLearned from7 sentences. Stress may be laid.Logical formLearned from7 sentences. Levels can be constituted-of-or-filled-with (water stress).Logical formLearned from7 sentences. A child may experience stress.Logical formLearned from7 sentences. Stress may make a difference.Logical formLearned from7 sentences. Anxiety may produce stress.Logical formLearned from7 sentences. Stress may work.Logical formLearned from7 sentences. Stress can be under.Logical formLearned from7 sentences.