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

单词	plastic mulch film
释义	plastic mulch film Encyclopedia 理学塑料地膜释 plastic mulch film塑料地膜覆盖在种植庄稼与蔬菜等植物的土地表面上的塑料薄膜。可以提高土壤温度，保持土壤湿度，改善土壤理化状况，防止病虫害，促进植物生长，特别对植物幼苗，具有护根、促生长的作用。
随便看	principal component estimate principal component estimate of the coefficients in linear regression model principal component estimation principal component of order p principal component regression principal component regression method principal component regression method (PCR) principal component regression spectrophotometry principal components principal components analysis principal component transformation principal computable enumeration principal congruence principal congruence relation principal congruence subgroup principal conjecture principal conjunctive normal form principal connex principal convergent principal coordinates of neighbour matrics principal crossed homomorphism principal curvature principal curve principal curves principal deformation

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