正铁血红蛋白

Infants are particularly susceptible to nitrite-induced methaemoglobinaemia because fetal haemoglobin converts to methemoglobin more easily. In addition, infants have a low concentration of the reducing enzyme such that methemoglobin is not converted back to hemoglobin as readily.

婴儿特别容易患上由亚硝酸盐引致的正铁血红蛋白血症，是因为胎儿的血红蛋白较易转变为正铁血红蛋白，而婴儿的还原浓度低，较难把正铁血红蛋白还原为红血球素。

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。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。