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...
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...