“birth and death urn model”的概念、定义、翻译、参考文献-科学参考

单词	birth and death urn model
释义	birth and death urn model Encyclopedia 理学临床试验的自适应性设计释 birth and death urn model生灭瓮子模型临床试验中一种自适应的序贯随机分配病人的方法（自适应设计或自适应随机化）。
随便看	history of bad effects of virtual economy history of Bahamas history of Bahrain history of Barbados history of barley cultivation history of barnyard grass cultivation history of bast crops cultivation history of bast fiber textile History of Beijing-Hangzhou Canal history of Belize history of Boehmeria nivea cultivation history of Brazil aerospace history of bream culture in China history of British aerospace history of buck-wheat cultivation History of Buddhism in Han Dynasty，Wei Dynasty，Jin Dynasties，Southern and Northern Dynasties history of Bulgaria History of Burmese Literature history of butterfish fishing in China history of Canada aerospace history of canal engineering technology in ancient China history of canals in the world history of Carangidae fishing in China history of carp culture in China history of carp fishing in China

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。