ureid

例句：

1. 1.The ureid crystals are used in the production of glass.
   这些结晶体用于制造玻璃。
2. 2. The ureid structure is a common feature in many biological molecules.
   尿素结构是许多生物分子的常见特征。
3. 3.Urea is a nitrogenous compound that can be used as a fertilizer.
   尿素是一种含氮化合物，可以用作肥料。