Anyone with heart, lung, or circulation problems should seek medical advice before flying.

任何有心、肺或血液循环问题的人都应该在飞行前寻求医生建议。

《柯林斯英汉双解大词典》

Hypoxia in hospital patients has various causes, from circulation problems to metabolism difficulties.

在医院中的患者发生组织缺氧的原因有很多种，从循环问题到代谢困难。

youdao

Sufferers of these hard-to-heal wounds mostly include elderly patients restricted to hospital beds or wheelchairs and diabetics beset by circulation problems.

这种难以治愈的伤口的患者主要是卧病在医院病床或轮椅的老年病人，或者是循环系统有问题的糖尿病患者。

youdao

Horses are often euthanized after serious leg injuries because circulation problems and deadly disease can arise if they are unable to distribute weight on all fours.

NPR: Barbaro Makes Progress After Leg Surgery

Alas, after reading the bill, I now know it has nothing to do with print media companies, per se, and is not about to save The New York Times from its circulation problems due to competition from the web.

FORBES: Under SOPA, "Justin Bieber Would Be In Jail"

Alternative therapies offer treatment for all complaints, from circulation and digestive problems to depression and stress.

BBC: NEWS | Health | Medical notes | Complementary medicines: A guide