The symptoms include shortness of breath, chest tightness and coughing.

症状包括呼吸短促、胸闷、咳嗽。

The most common symptoms are coughing, chest tightness, getting tired easily, and wheezing.

最常见的症状是咳嗽、胸闷、容易疲劳以及气喘。

Smooth muscle constriction results in the feeling of chest tightness.

平滑肌收缩导致胸闷感。

That said, symptoms of asthma include coughing, a feeling of chest tightness, dyspnea, or difficulty breathing, and wheezing, or a high-pitched whistling sound that usually happens during exhalation.

也就是说，哮喘的症状包括咳嗽、胸闷、呼吸困难、喘息，即呼气时伴随高调吹哨音。