A breathing may decline an average of some percent.Logical formLearned from2 sentences. Workers may undergo (breathing masks).Logical formLearned from2 sentences. (Breathing masks) of workers may fit.Logical formLearned from2 sentences. Persons may hear a heavy breathing of fear.Logical formLearned from2 sentences. (Piston engines) may modulate (engine breathing) with variable-valve timing.Logical formLearned from2 sentences. Breathing may be disrupted during sleep.Logical formLearned from2 sentences. A nature may undergo a (breathing space).Logical formLearned from2 sentences. Hospitals may treat some patients with (breathing problems).Logical formLearned from2 sentences. A man may have (trouble breathing).Logical formLearned from2 sentences. A male may develop some (breathing problems).Logical formLearned from2 sentences. A group may begin with deep breathing.Logical formLearned from2 sentences. Devices may monitor a breathing.Logical formLearned from2 sentences. Breathing can be easier for millions of elderly persons.Logical formLearned from2 sentences. A bullet may stop a breathing.Logical formLearned from2 sentences. A breathing can be clean.Logical formLearned from2 sentences.