求翻译：小儿肺炎是临床的常见病，多发病。由于小儿的呼吸系统善不健全，也是婴儿时期死亡的原，一旦病情发展，极易心力衰竭。是什么意思？

Children with pneumonia is clinical common disease. Pediatric respiratory system does not sound good, but also the deaths of the original infancy, once the progression of the disease, vulnerable to heart failure.

pediatric pneumonia is clinical for common diseases, diseases prevalent. Because of the respiratory system and my son is not perfect, and is also the baby died during the development of disease, once, a very easy-to-heart failure.

Young child pneumonia is the clinical common disease, frequently-occurring disease.Because young child's respiratory system friendly is not perfect, also is the baby time death original, once condition development, extremely easy heart failure.

Pneumonia is a common disease of clinical, frequently occurring illnesses. Because of the respiratory system in children good without sound, as well as infant deaths during the period of the original, as soon as the disease progresses and is easy for congestive heart failure.