常見例句polydibenzyl malonyl urea 聚二芐基丙二酰脲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(shí)是個(gè)小數(shù)目。Government tender urea must submit price by 18th noon. 政府招標(biāo)尿素，須于18日正午前報(bào)價(jià)。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。 返回 malonyl urea