When the operating time is constant, the plastic film cover of precipitation is decided by the rainfall duration and daily evaporation.
当操作时间一定时，塑苫的降水量由降水持续时间和日蒸发量决定。
The vitrification rate caused by cotton plug wrapped in cheese cloth was the lowest among all seal materials, including polyethylene film, plastic cover and sulfuric paper.
封口材料中聚乙烯膜和塑料瓶盖两个处理玻璃化率相似且玻璃化率高，硫酸纸次之，棉塞的最低。
This paper studied the effect of plastic film mulch cover on growth and development and water use efficiency of small squash in the dryland.
研究了地膜覆盖对旱砂地小南瓜生育特性和水分利用效率的影响。
The test results in different places and in many years showed that there was a striking increase, covered by water permeability plastic film in maize yields than conventional film and than no cover.
多年多点试验示范表明：渗水地膜覆盖玉米增产效果显著，主要表现为单株生产力的提高，在年均积温较小的地区增产幅度大。
Steel pole, fibreglass ribs, colorful crystal handle, colorful nylon cloth cover, translucent plastic film packing, both for rainy and sunny use.
钢杆，玻纤伞骨，彩晶柄手柄，花尼伞面，透明膜包装，晴雨兼用。
The plastic film in the bottom of Garden of perfect splendor is equal to cover up a lot of garbages, as is known to all, it can pollute the environment.
埋入圆明园湖底的防渗透塑料薄膜实际上是等于埋入一大堆垃圾，其塑料膜本身污染环境。
Steel pole, steel ribs, golden handle, sadin cloth cover, translucent plastic film packing, both for rainy and sunny use.
钢杆，钢骨，双金套手柄，色丁布伞面，透明膜包装，晴雨兼用。
Place the chicken breast on cutting board, with one sheet of plastic film under it, and cover it with another sheet.
将鸡胸肉放置在砧板上，上下各铺一张保鲜膜。
Therefore, there were more menace to sugar beet covered with plastic film when in dry condition, no irrigation and little rain. So, the techniques of cover...
因此，当无灌溉条件降雨又少时，地膜覆盖甜菜受干旱威胁更大，故在干旱无灌溉地区不宜推广地膜覆盖技术。
Therefore, there were more menace to sugar beet covered with plastic film when in dry condition, no irrigation and little rain. So, the techniques of cover...
因此，当无灌溉条件降雨又少时，地膜覆盖甜菜受干旱威胁更大，故在干旱无灌溉地区不宜推广地膜覆盖技术。
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