“record of river variation”的概念、定义、翻译、参考文献-科学参考

单词	record of river variation
释义	record of river variation Encyclopedia 工学中国水利科学技术史释 record of river variation信水中国古代对河流随季节、气候推移转化，定时定点发生涨落等动态的统称。《宋史·河渠志》（1345年成书）概括为“水信有常，率以为准”。
随便看	positive homogeneous function positive hull positive image positive index of inertia positive infinity positive integer positive integral kernel positive interaction between nutrients positive ion positive ion, cation positive ion mode positive kernel positive kurtosis positive leap second positive lens Positive likelihood ratio positive limit point positive limit set positive linear functional positive linear operator positive link positive literal positive logic positive logical calculus positive logical formula

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。