血红蛋白血

Methaemoglobin loses its ability to bind oxygen and causes hypoxia in the affected individuals. The condition is characterized by headache, weakness and breathlessness, and a bluish discolouration of the skin and mucous membranes called cyanosis.

这是因为亚硝酸盐使体内红血球素中的铁由亚铁氧化成正铁，正铁血红蛋白失去携氧能力，造成血氧过少，令人感到头痛，虚弱，呼吸困难，皮肤和黏膜会变成紫蓝色，医学上称为发绀。

Methods: 24 patients with β-thalassemia were diagnosed by hemoglobin electrophoresis from patients with hypochromic microcytic anemia .

小细胞低色素贫血患儿外周血用血红蛋白电泳法作临床诊断。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。