“中国历史时期气候”的概念、定义、翻译、参考文献-科学参考

单词	中国历史时期气候
释义	中国历史时期气候 Encyclopedia 理学中国历史气候释 Chinese historical climate中国历史时期气候历史气候指人类文明出现以来，至有仪器观测资料为止的历史时期的气候，其时间界限随地区而异。在中国，指距今5000年中华文明出现以来的气候。
随便看	nonnegative definite matrix nonnegative definiteness nonnegative definite quadratic estimate non-negative definite quadratic estimator nonnegative divisor 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

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