Substances such as urea ( a leftover from protein metabolism ) and excess phosphate ions therefore flow from the blood to the water .
这样,诸如尿素(蛋白质新陈代谢所留下的残余物质)和多余的磷酸盐离子等物质便从血液转移到水中。
A 1 % quota tariff rate will be charged on urea , compound fertilizer and diammonium hydrogen phosphate .
对尿素、复合肥、磷酸氢二铵三种化肥的配额税率执行1%的税率。
Urea isn 't commonly found in agricultural fertilizers , but it is present in many garden products .
尿素很少用于农业肥料,但是常常用作花肥。
One way round this for a swimming animal is to develop an outlet which allows urea to dissolve directly in the water as it swims , which is what the turtles seem to have done .