Word · Frequency #27883
ureas
尿素
ureas is the plural of urea.
核心释义
a colorless crystalline compound that is the main nitrogen-containing substance in mammalian urine, also produced synthetically for use as a fertilizer and in animal feed and plastics
- 1.
一种水溶性有机化合物,化学式为CO(NH2)2,由蛋白质代谢生成并随尿液排出。
A water-soluble organic compound, CO(NH2)2, formed by the metabolism of proteins and excreted in the urine.
- 2.
尿素的任何N-取代衍生物,通式为(R1R2N)CO(NR3R4)。
Any N-substituted derivative of urea, with the general formula (R1R2N)CO(NR3R4).
一种水溶性有机化合物,化学式为CO(NH2)2,由蛋白质代谢生成并随尿液排出。；尿素的任何N-取代衍生物,通式为(R1R2N)CO(NR3R4)。；尿素；[化] 脲; 尿素
用法In use
Farmers often add urea to the soil to help crops grow.
用法提示：这里的 urea 是名词，表示用作肥料的尿素。
The lab test measures the level of urea in a blood sample.
用法提示：这里的 urea 是名词，指血液中的尿素成分。
Urea is found in the urine of mammals as a waste product.
用法提示：这里的 urea 是名词，作主语，指哺乳动物尿液中的尿素。
there is urea in sth
There is urea in mammalian urine.
哺乳动物的尿液中含有尿素。
urea is a component of sth
Urea is a major component of urine.
相关词与表达Connections
搭配Collocations
- urea fertilizer
- 尿素肥料
- The farmer applied urea fertilizer to the wheat fields.农民往麦田里施用了尿素肥料。
- urea cycle
- 尿素循环
- The urea cycle converts ammonia into urea in the liver.尿素循环在肝脏中将氨转化为尿素。
- urea breath test
- 尿素呼气试验
- The doctor used a urea breath test to check for the bacteria.医生用尿素呼气试验来检查是否有这种细菌。
- blood urea nitrogen
- 血尿素氮
- High blood urea nitrogen can indicate kidney problems.血尿素氮偏高可能表明肾脏有问题。
- urea cream
学习提示Learner notes
记忆技巧Memory Tip
联想记忆：urea 以 'ur' 开头，像 urine（尿液），尿素正是尿液中的成分，看到 ur 就想到尿。
语境与语域Context & Register
语域：formal 常见场景：scientific writing、medical diagnostics、agricultural fertilizer 尿素是科学术语，多用于化学、医学或农业等专业语境，日常口语中不常用。
发音与拼写Pronunciation & Spelling
urea 重音在后：/juəˈriə/。真正与其押韵的有 diarrhea、gonorrhea（美式读 /-riːə/）。bacteria、cafeteria、area、malaria 拼写相近，但重音或元音不同，不押韵。
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.