A survey about old patients of chronic obstructive pulmonary disease to respond to bronchodilator after long-term inhalation of ipratropium bromide and salbutamol是什么意思_A survey about old patients of chronic obstructive pulmonary disease to respond to bronchodilator after long-term inhalation of ipratropium bromide and salbutamol在线翻译_英语_读音_用法_例句