以下为句子列表：
英文: Urea (carbamide)One of the simplest organic compounds and the first synthesized from inorganic raw materials (see inorganic compound), by Friedrich W?hler (1800-82) in 1828.
中文: 尿素(亦称碳醯胺):最简单的有机化合物之一。1828年由德国化学家维勒(1800～1882)，第一个从无机材料合成的。
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英文: 50 kg/ha of urea + 50 kg/ha of KCl 50-60 days after planting. There is no need of herbicides.
中文: 播后50~60天追施50公斤/公顷尿素和50公斤/公顷氯化钾。没必要用除草剂。
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英文: A description is given of the analytical method for the determination of the urea content in slow-release urea by the p-dimethyl aminobenzaldehyde spectrophotometry.
中文: 摘要介绍用对二甲氨基苯节醛分光光度法测定缓释尿素中尿素含量的分析方法。
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英文: A presentation is given of the working principle and structural properties of 3 kinds of hag filters used in the urea packing system, their operation and relevant improvement measures are summed up, and an analysis is made of the existent problems, with c
中文: 摘要介绍了尿素包装系统中所使用的3种袋式除尘器的工作原理、结构性能，总结了其运行情况和相关的改进措施，并就存在的问题加以分析、提出对策。
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英文: Amino and urea compounds are commonly used in applications demanding high levels of hygiene.
中文: 在对卫生要求较高的环境中，氨基和尿素化合物一直得到广泛使用。
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