Urea pollution can trigger ocean algae to produce a deadly toxin called domoic acid, scientists have discovered.(科學家發現，受尿素污染的海藻能生成一種致密毒素軟骨藻酸。)

Chaotropic agents, such as urea and guanidine are capable of bringing some hydrophobic compounds into aqueous solutions.(諸如尿素和胍的離液劑能夠將一些疏水化合物帶入水溶液中。)

The optimum nitrogen source is urea, next is peptone or yeast extract.(氮源中尿素最好，其次為蛋白胨和酵母膏；)

Remove asbestos or urea-formaldehyde insulation from buildings when required.(需要時從建筑物上移除石棉或脲醛絕緣物。)

Canada is rich in natural resources, for ammonia, urea, methanol and ethylene production.(加拿大有豐富的天然氣資源，用于合成氨、尿素、甲醇和乙烯的生產。)

An amine or amino resin is the alkylated reaction product of urea or melamine and formaldehyde.(含胺基或氨基樹脂是尿素或三聚氰胺和甲醛烷基化反應產品。)

"Marine animals release small amounts of urea, but the pollution problem is almost entirely human caused," says Kudela.(庫德拉認為海洋動物排泄的尿素很少，污染問題幾乎都是人類造成的。)

Blood urea nitrogen and creatinine were determined on 1, 3, 5 days after CDDP treatment.(CDDP處理后，分別在第1、3和5天采血，測定血清尿素氮和肌酐。)

Urea naturally breaks down into ammonia in the water.(尿素在水中會水解成氨。)

Serum creatinine and blood urea also may be measured to assess your overall kidney function.(血清肌酐和尿素水平也可以用來評估腎功能。)