尿素塑料(類)

A clathrate compound, such as urea. 包合物一種籠狀化合物，如尿素

But 120 tons of urea is really a small one. 但120噸尿素確實是個小數(shù)目。

Government tender urea must submit price by 18th noon. 政府招標尿素，須于18日正午前報價。

They are often synthesized from isocyanates or substituted ureas. 其合成方法主要有異氰酸酯法和取代脲法等方法。

Allantoin is one of the important urea derivative products. 尿囊素是一種重要的尿素衍生產(chǎn)品。

A kidney also takes urea and mineral salts out of the blood. 腎還排出血液中的尿素和無機鹽。