The glomeruli filter fluid from your blood, extracting both waste products and substances your body needs — sodium, phosphorus and potassium.
肾小球过滤血液，从中摄取代谢废物和各种身体所需物质——钠、磷和钾（译者：离子？）
2
Sodium formate from waste alkali liquor was analyzed by perchloric acid nonaqueous titration instead of potassium permanganate method, which caused larger deviation.
采用高氯酸非水滴定法分析废碱液中的甲酸钠，代替了误差较大的高锰酸钾法。
3
Congestive heart failure interferes with the kidney's normal function of eliminating excess sodium and waste from the body.