“plastic mulch cultivation”的概念、定义、翻译、参考文献-科学参考

单词	plastic mulch cultivation
释义	plastic mulch cultivation Encyclopedia 农学设施栽培释 plastic mulch cultivation地膜覆盖栽培将专用塑料薄膜（地膜）贴盖于栽培地表面以促进作物生长发育的栽培方式。主要用于蔬菜、果树、花卉等园艺作物，玉米、马铃薯等粮食作物，以及棉花等经济作物的栽培等。
随便看	positive real part positive real system positive recurrent point positive recurrent state positive reinforcement positive relation positive result positive root positive root system positive rotation positive school of criminology positive selection positive self-adjoint operator positive self-regard positive semi-definite positive semi-definite form positive semi definite Hermitian matrix positive semi-definite Hermitian matrix positive semi-definite kernel positive semi definite matrix positive semi-definite matrix positive semi-definite operator positive semi definite quadratic form positive semi-definite quadratic form positive semi-definite rational function

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