Because COPD is an ailment that blocks airflow in the lungs, it is critical that COPD patients often focus on breathing, exercise regularly and learn relaxation techniques, especially when they are short of breath.

VOA: standard.2010.06.21

You reduce a lot of the health risks, if you exercise often.

如果你经常运动的话，它会帮你降低许多健康问题的风险。

It's important 实战 - SpeakingMax英语口语达人