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1·There is no cure for COAD . Medical therapy can relieve symptoms only.

慢性阻塞性肺病不能根治，药物疗程可以舒缓症状。

2·The freighting donkeys the small donkeys are moving slowly with the heavy coad on their backs.

《托运的驴子》小毛驴背上沉重的负担，缓慢地行走在路上。

3·COAD commonly results from chronic smoking. There is no cure for COAD. Medical therapy can relieve symptoms only.

慢性阻塞性肺病主要因长期吸烟所致。慢性阻塞性肺病不能根治，药物疗程可以舒缓症状。

4·Applied to all kinds of farm and new rural construction project engineering, oil field gas, coad bed gas power generation project.

应用于各类养殖场和新农村建设沼气发电工程；油田伴生气、煤层气发电工程。

5·The change of volatile in Tengnan coad field has the phenomenon of anti Hilt law in vertical direction and the trend of increase from the south to the north in horizontal direction.

滕南煤田的煤层挥发份变化在纵向上具有反希尔特定律的规律；