n.尿素，脲

Urea is commonly used as a nitrogen fertilizer in agriculture.
农业中常使用尿素作为氮肥。
The blood test showed elevated levels of urea, indicating kidney function issues.
血液测试显示尿素水平升高，暗示肾脏功能异常。
After the long hike, she felt a burning sensation in her legs – probably from the buildup of urea.
长途徒步后，她感到腿部有灼热感，可能是尿素积累的结果。
Urea is a key component in many industrial processes, such as the production of plastics and resins.
尿素在许多工业过程中起着关键作用，如塑料和树脂的生产。
The doctor recommended a low-protein diet to reduce the patient's urea output.
医生建议病人低蛋白饮食以减少尿素的排泄。
Urea is often used as a coolant in car radiators due to its high heat absorption capacity.
尿素因其高吸热能力，常被用作汽车散热器的冷却剂。
The soil bacteria convert urea into ammonia, which plants can absorb for growth.
土壤中的细菌将尿素转化为氨，植物可以吸收用于生长。
Urea is a non-toxic substance that is harmless to the environment when properly disposed of.
尿素是一种无毒物质，妥善处理对环境无害。
In the laboratory, scientists analyze urine samples to measure urea levels as an indicator of hydration status.
在实验室里，科学家分析尿液样本来测量尿素水平，作为判断水分状况的指标。
Urea-based cleansers are gentle on sensitive skin, making them a popular choice for skincare products.
尿素基清洁剂对敏感皮肤温和，是护肤品的常见选择。