“necessary nutrients”的概念、定义、翻译、参考文献-科学参考

单词	necessary nutrients
释义	necessary nutrients Encyclopedia 工学营养素释 necessary nutrients必需营养素人体生长发育所必需，但人体内不能合成或合成不足，必须由食物中获取的营养素。
随便看	non negative characteristic form non-negative characteristic form nonnegative characteristic form nonnegative combination nonnegative definite nonnegative definite kernel 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

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