urea
urea — 名詞
1. a white chemical substance that contains nitrogen. Living bodies create it as wa
尿素
含氮廢物，存於尿液及肥料
a white chemical substance that contains nitrogen. Living bodies create it as waste and expel it in urine. Factories can produce it from ammonia. It is put into plant foods and livestock feeds, and used when manufacturing plastics.
The kidneys filter urea from blood and pass it out of the body in urine.
腎臟將尿素從血液中過濾出來，再透過尿液排出體外。
uncountable noun; used with verb 'filter'
Farmers spread granular urea on rice fields before planting to increase the harvest.
農夫在插秧前將顆粒狀尿素撒在稻田裡，以增加收成。
collocation: granular urea / spread urea
Niran learned in chemistry class how factories make urea from ammonia and carbon dioxide.
Niran 在化學課學到工廠如何用氨和二氧化碳製造尿素。
Camille bought a hand cream that contains urea to treat her dry, cracked skin.
Camille 買了一條含有尿素的手部護膚霜，來治療她乾裂的皮膚。
- carbamide
the chemical-science name for urea, used mainly in pharmaceutical and laboratory settings
文法句型
uncountable noun — no plural form; used with singular verbs
用法筆記
Because urea is a substance, it is uncountable and has no plural form. It appears most often in science, farming, and manufacturing contexts rather than everyday conversation.