to cough

to suppress coughing

to cough without phlegm; a non-productive cough

to cough up and spit out phlegm or mucus from the respiratory tract

an infectious bacterial disease of the respiratory system, characterized by convulsive coughs followed by a high-pitched intake of breath

to cough up blood

(dialect) to cough

relieving or suppressing a cough

cough suppressant syrup or medicinal cough mixture

medicine taken to relieve a cough

Respiratory problems caused by dry and polluted Beijing air, typically experienced by non-acclimated foreigners who would otherwise have no such problems.