It is found that the improved nine level model has a better simulations of the geopotential field, the temperature field and the precipitation field in winter and summer.
对比检验表明，改进后的九层模式对高度场、温度场及降水场的模拟均要优于原五层模式。
In order that the crops in open field could survive safely the winter frost prevention operation is of Paramount importance.
为了使这些大田作物能够安全越冬，防霜作业具有极端重要意义。
Studies are conducted on melting snow and keeping green by electric cable heating system on Beijing sports turf in winter, grass seed selection, and turf soil temperature field.
本文对北京地区草坪冬季电缆电热融雪保绿问题，草种的选择及土壤温度场进行研究，旨在对北京地区草坪电缆加热系统进行优化设计。
The main results are as follows: the influence of anomalous winter monsoon on the wind field in SCS region may persist from winter to summer.
结果表明，冬季风异常对流场的影响可以从冬季持续至春、夏季。
When the duration of surface snow cover is long and intensity of surface heating field is weakness in winter, the intensity of surface heating field is strong in next summer.
冬季地面积雪多的年份，地面加热场强度较弱，第二年夏季加热场强度则较强；
In the winter, the fields are withered. After a snow, the field appears as if covered by a white quilt. It's cool and soft to lie on.
冬天田地里一片干枯。下完一场雪，田地好像盖上一床雪白的被子。躺上去凉凉的，软软的。
AIM:To observe the changes of the cell immunological function in soldiers during field training in winter.
目的：观察冬季野外训练期间战士细胞免疫功能的变化。
As the basic event in Winter Games, speed skating is what field and track in Summer Games.
就像夏季运动会中的田径项目一样，速度滑冰是冬季运动会中的基础项目。
It is obvious that indoors thermal environment in summer and winter of camped clay building is better than that of the brick building through the field measurements.
现场的室内热环境测试显示夯土民居冬、夏季的热环境都明显好于当地的简易式砖房。
In order to reinvent the stadium as a snow park, snow blowers were brought in to cover the field with a few centimeters of snow and some winter games were set up.
为了把露天运动场改为冰雪公园，人们引进一些喷雪机给地面覆盖一层几厘米厚的积雪，同时设置一些冬季比赛项目。
The field plot experiment was conducted to study the difference of Nitrogen Use Efficiency in 10 winter wheat cultivate (genotype) on the loess plateau.
本文采用田间小区试验研究了渭北旱塬农业生产中现行10个冬小麦品种的氮效率差异。
The ABS developed by this rapid development system has been used in vehicle summer and winter field test and promising results have been obtained.
利用该开发系统对车辆防抱死制动系统（ABS）进行开发。最后把研制的ABS控制器应用于实车进行道路试验，取得较好的效果。
Influences of environmental factors on water use efficiency (WUE) of winter wheat grown in field under different water treatment were studied.
对干湿两种水分处理下农田冬小麦群体水分利用效率与环境因子的关系进行分析。
A field experiments was conducted to study soil moisture and water potential changes in farmlands with a shallow water table during summer maize and winter wheat seasons.
通过对夏玉米和冬小麦生长季节期间土壤水动态观测试验，探讨了地下水浅埋条件下土壤水动态的变化规律。
A field experiment was conducted to study the influence of black fluid-film mulched covered winter wheat in dry land on soil microhabitats and yield.
采用田间小区试验研究了黑色液膜覆盖旱地冬小麦对土壤微生境及产量的影响。
An experiment was carried out to study changes in soil moisture in winter wheat field under the conditions of drip irrigation, furrow and ridge planting.
试验在池栽条件下研究了滴灌与垄沟耕作条件下冬小麦田间土壤水分的动态变化。
The seasonal variation of surface heating field is obvious:the intensity is strong in summer and weakness in winter.
地面加热场强度的季节变化明显，夏季强、冬季弱；
The result showed that N2O and NO emissions from vegetable field and winter wheat field of rice-wheat rotation systems in southeast China had different seasonal variation rules.
结果表明，蔬菜地和华东稻麦轮作生态系统冬小麦田的NO和N_2O排放具有不同的季节变化规律。
Effect of fertilizers on rain fed winter wheat and its requirement characters in an extremely desiccative year were studied in 1994~ 1996 by using regression design and field investigation.
采用四因子二次通用旋转组合设计，结合大田调查与土壤肥力测试，于1994～1996年在浮山县张庄乡，对特大干旱年旱地冬小麦的施肥效应及需肥特点进行了研究。
The result of the field application has shown that the model has a high precision in simulating the water dynamic state and "five kinds of water" interrelation in winter wheat field.
经大田初步试验表明，该模型对于模拟麦田水分动态和“五水”转化关系具有较高的精度。
Its back side will be used for sledging in winter, and as an amphitheatre for a football field during the rest of the year.
山的背面，冬季可以用作滑雪场地，其他季节也做足球场的看台使用。
This has been very successful in preventing illness this winter. Working in a health care field, I contact may people each day, and have not been ill yet.
这是在冬天时能成功防御疾病的有效健康产品，我每天接触很多人，但是从来没有生病过。
The effect of different plant densities on root growth in winter wheat was studied in field and pot culture experiments.
在大田和盆栽条件下，研究了种植密度对冬小麦根系的影响。单株次生根随密度增加而减少，且因生育期进展其影响更为显著；
The fate of nitrogen fertilizer in current crop and succession crops in winter wheat and summer maize rotation system were studied using field 15n micro-plot.
采用田间微区15n示踪试验研究了肥料氮在冬小麦、夏玉米当季和后茬的去向。
The fate of nitrogen fertilizer in current crop and succession crops in winter wheat and summer maize rotation system were studied using field 15n micro-plot.
采用田间微区15n示踪试验研究了肥料氮在冬小麦、夏玉米当季和后茬的去向。
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