A cold is an infection of the upper respiratory tract.感冒是上呼吸道的感染。These gases would seriously damage the patient's respiratory system.这些毒气会严重损害患者的呼吸系统。If you smoke then the whole respiratory system is constantly unde...
The chronic benzolism to the skin, the eye and the upper respiratory tract has the stimulation.慢性苯中毒会对皮肤 、 眼睛和上呼吸道有刺激作用.Most of patients have aridity of nasal mucosa, burning pain, discomfortable symptom of respiratory c...