| 1. | When viruses , germs and other injurants in the air enter the human lung through breath , the function of poisons will weaken the resistance of respiratory tract and result in respiratory diseases and various chronic diseases as well
在空气中的病毒、细菌及其它有害物质通过呼吸进入人的肺部，在有毒物质的作用下，呼吸道的抵抗力将会渐渐减弱，从而引起呼吸道疾病以及各种慢性病。 |
