求翻译：这种疾病称为正铁血红蛋白血症，是婴儿紫症的病因之一—婴儿的水分和氧气需要量很大，而由于亚硝酸的存在，他们的血红蛋白值却很低是什么意思？

The disease known as methaemoglobinaemia, purple baby syndrome is one of the causes - the baby's high demand of water and oxygen, and because the presence of nitrite, their value is very low hemoglobin

This disease is known as iron hemoglobin in blood, and the infant purple their cause--one infant The moisture and oxygen needs a large volume of amides, and as a result of hemoglobin exist, they have very low value

This kind of disease is called the blood and iron red proteinemia, is of - baby's baby purple sickness causes of disease moisture content and the oxygen required quantity is very big, but as a result of the nitrous acid existence, their hemoglobin value very is actually low

Effects of the disease known as methemoglobin, was one of the causes of infant purple-baby moisture and oxygen are in great demand, and because of the presence of nitrite, their hemoglobin value is very low

Effects of the disease known as methemoglobin, was one of the causes of infant purple-baby moisture and oxygen are in great demand, and because of the presence of nitrite, their hemoglobin value is very low