the lung-qi being kept pure and descendant

例句：

1. 1. The ancient Chinese believed that the lung-qi is essential for life.
   古代中国人认为肺气是生命所必需的。
2. 2.In traditional Chinese medicine, the lung-qi is considered to be the foundation of health.
   在传统中医中，肺气被认为是健康的基础。
3. 3. After a long illness, he regained his lung-qi and was able to return to work.
   经过长时间的病痛后，他恢复了肺气，能够返回工作。