We must protect primary farmland, keep the area sown to grain stable, improve the structure of grain varieties grown and increase the per unit area yield of grain.
要保护好基本农田，稳定粮食播种面积，优化粮食品种结构，着力提高粮食单产。
The other way to think about it is divergence is the source rate, it is the amount of fluid that is being inserted into the system, that is being pumped into the system per unit time per unit area.
另外一个理解方法是，散度是源头的“冒出率”，它是流体往系统输入的量，也就是单位时间内，单位面积新冒出的流体。
The bone mineral density (BMD) means the bony mineral quantity per unit area, which is an important index reflecting the metabolic status of the skeleton of human being.
骨密度是指骨单位面积所含的骨矿物量，它是反映人体骨骼代谢状况的一项重要指标。
We will effectively keep the area planted with grain crops stable, focus on increasing the yield per unit area and optimizing the variety mix, and increase the country's grain production capacity.
我们要切实稳定种植面积，着力提高单产，优化品种结构，推进全国新增粮食生产能力建设。
Ways of improving crop yield per unit area and the countermeasures.
提高作物单产的途径与对策。
There is potential for increasing the yield per unit area on the existing cultivated land.
提高现有耕地单位面积产量有潜力。
Fuel load is measured by the amount of available fuel per unit area, usually tons per acre.
可燃物负荷是测量每块地区可得燃料的数量，通常是每英亩的吨数。
The sharp increase of transistors per unit area takes a challenge to the reliability of NOC.
单位面积晶体管的急剧增多，给NOC可靠性带来了挑战。
The number of panicles per unit area was the most important yield components in determining final yield.
单位面积小穗数是决定最终产量最重要的产量构成因素。
And it was more significant to achieve higher yields by increasing grain number per spike than by enhancing spike number per unit area.
通过增加穗粒数来实现高产比增加单位面积穗数意义更大。
Because of the diminishing opportunity to expand cultivated land, researches have been mostly focused on the rise of yield per unit area.
由于扩大耕地面积的可能性越来越小，研究已主要集中于提高单位面积产量。
It was found that the oxygen concentration on carbon black surface is proportional to the ozone supplied per unit area of carbon black surface.
研究表明，碳黑的表面含氧量与提供给单位碳黑表面的臭氧量成正比。
The bolls per unit area of cotton leafy shoots retained at low density could reach the same level as cotton leafy shoots removed at normal density.
低密度下留叶枝单位面积成铃可以达到高密度下不留叶枝的水平。
An important method of increasing rice yield per unit area is to improve the rice-planting mechanization lever and use advanced planting technology.
提高水稻单产的一项重要措施是提高水稻种植机械化水平，即采用先进的种植技术。
Four components contribute to rice grain yield including the panicles per unit area, the number of spikelets, the percentage of, and the weight of ripe grains.
四个水稻籽粒产量构成因素为单位面积穗数、小穗数、成熟籽粒百分数和成熟籽粒重量。
Moreover, the application of angle-count cruising to calculating the stand volume, standard stock number, stand weight and stock number per unit area, is discussed.
本文探讨了角规测树法在测算毛竹林分蓄积量、标准株数、林分重量及单位面积株数中的应用。
Increasing yield level per unit area is forever theme for rice breeding aim, and advancing photosynthesis efficiency is one of key factors for improving grain yield.
提高单位面积的产量是水稻育种目标永恒的主题，提高光合作用效率又是提高产量的关键因素。
The measured CO2 values are substituted in a formula to calculate the CO2 flux per unit area and per unit time at different depths under standard atmospheric pressure .
将测得的CO2浓度值代入计算公式，即可求得标准大气压下某一深度土壤单位面积、单位时间内的CO2通量值。
The result of experiments shows that the inclined plate settlers have a high throughput per unit area and the degree of separation compared with common gravity settler.
结果表明，斜板沉降器的处理负荷与同尺寸的普通重力沉降器相比有大幅度的提高。
The paper puts forward the quantization formula by regarding fictitious yield per unit area as one way of contrasting and evaluating the economic results of aquaculture.
本文提出以虚拟单位产量作为比较与评价水产养殖经济效果的一种方法，给出了量化公式。
But many defects exist in the pear industry such as unreasonable varieties structure, low yield per unit area, the shortage of high quality fruits, poor benefit and so on.
但是，从整个梨产业结构来说还存在不少问题，如品种结构不合理，单位面积产量低，优质果少，经济效益差等。
The analysis includes the concentration ratio at the base of a GCL, advective and diffusive mass flux, and total accumulated contaminant mass through the liner per unit area.
从衬垫底部浓度比、对流和扩散通量、污染物累积运移量等方面，对污染物在GCL中的运移进行了计算。
In the thermal analysis, the initial temperature of billet, beat fluxes (heat flow per unit area) of positive and negative value and convections to surrounding air are considered.
热分析中考虑了坯料的初始温度、外加热源和冷却源的热流密度以及坯料和空气的对流传热。
Pathological staining and image analysis were used to determine the perimeter and the area of left ventricular cavity, and myocardial nuclei number and collagen content per unit area;
病理染色图象分析测定左室腔周长和面积、单位面积内心肌细胞核数、单位面积内胶原的含量；
Since 1987, late rice is planted in extensive area. The meteorological factors influencing the variation of grain yield per unit area from 1987 on differ obviously with those before 1987.
1987年大面积种植单季晚稻以来，影响粮食单位面积产量变化的气象条件与1987年之前有着明显的差异。
Since 1987, late rice is planted in extensive area. The meteorological factors influencing the variation of grain yield per unit area from 1987 on differ obviously with those before 1987.
1987年大面积种植单季晚稻以来，影响粮食单位面积产量变化的气象条件与1987年之前有着明显的差异。
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