“International Polar Year”的概念、定义、翻译、参考文献-科学参考

单词	International Polar Year
释义	International Polar Year Encyclopedia 理学国际极地年释 International Polar Year; IPY国际极地年世界各国对两极和高纬度地区地球物理现象进行联合观测的活动。 Astronomy International Polar Year缩写：IPY。国际极地年
随便看	nonnegative element nonnegative function nonnegative integer nonnegative integral kernel nonnegative manifold nonnegative matrix non-negative matrix factorization nonnegative measure nonnegative number nonnegative operator nonnegative orthant nonnegative partial sum nonnegative quadratic form nonnegative semi-definite matrix nonnegative solution nonnegative splitting nonnegativity nonnegativity condition nonnegativity requirement non nesting matching non-nesting matching nonnesting matching non nesting partition non-nesting partition nonnesting partition

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。