Second, a frost must be present (ideally for several days in a row), with the temperature ranging somewhere between -13 and -8 degrees Celsius (or about 8.6 and 17.6 degrees Fahrenheit).
第二，要处于结霜的状态(理想的是连续几天持续这状态)，温度大概处于- 13到-8摄氏度。
Disasters from low temperature, frost and snow made a total direct economic loss of 159.5 billion yuan with a death roll of 162.
全年低温冷冻和雪灾造成直接经济损失1595亿元，死亡162人。
The influence of different covered depths, thickness of frozen wall, excavating radius, original water content and brine temperature on frost displacement are discussed for horizontal freezing model.
探讨了在水平冻结情况下覆盖厚度（埋深）、冻土壁厚度、开挖半径、含水量和盐水温度对冻胀位移的影响。
The experimental results demonstrate that this coating could restrain the frost growth in the condition of lower relative humidity and higher cold plate temperature.
结果表明在环境相对湿度较小、冷壁温度不太低的条件下，这种涂层能够较好地抑制霜层的生长。
One November night the temperature plunged to below zero, and we woke up to find interior walls covered with frost.
十一月份的一个夜晚，温度突然降到零度以下，我们醒来发现内墙覆盖了霜。
By using the surface minimum temperature of 4 observational stations in the period 1971 ~ 2005 in Baiyin area, the spatial features and frost evolution were analyzed.
利用1971 ~ 2005年甘肃省白银市辖区4个台站逐日地面最低温度资料，统计分析了早、晚霜冻发生的气候特征和时间变化规律。
It is also found that the most important factors that influence the frost growth are the temperature of cold plate and relative humidity of air.
实验还发现，对霜层生长初期影响最大的两个因素是冷表面的温度和空气的相对湿度。
The frost heaving damage is main damage form of lining channel in north China, which is an integrative result of temperature, water content, soil characteristic and frost force.
渠道衬砌的冻胀破坏是温度、水分、土质和冻胀力等因素共同作用的结果，是北方地区渠道的主要破坏形式。
On a cloudless night, frost may form on horizontal surfaces even when the temperature of the air is above freezing.
在晴朗的夜晚，即使空气的温度在冰点以上，地平面上也能结霜。
Through modeling the true field temperature process, the research on frost heave adaptability model test of Reno mattress revetment was made in low temperature laboratory.
通过模拟野外实测降温过程，在低温试验室内进行雷诺护垫结构冻胀适应性模型试验研究。
Many plants can acquire increased frost tolerance after a period of exposure to low, non-freezing temperature through a complex adaptive process called cold acclimation.
许多植物在经过一段时间的非冻低温作用后其抗寒性获得增强，这种现象被称为植物的低温驯化。
With an annual average temperature of 12 degrees centigrade, and rainfall of 590 millimeters, it has 220 frost-free days per year.
年平均温度在12摄氏度左右，降雨量为590毫米，平均每年有220天温度在零下。
Clearer skies and much light winds allowed temperature into drop well into single figures resulting in a touch of grand frost in some rural areas.
天气越是晴朗，微微清风让气温骤降到各位数，郊外部分地区出现大面积霜冻。
This machine is provided with function of anti-frosting and auto frost removing, and this can make sure the machine work stably under the low temperature.
机组具有防结霜和自动化霜功能，确保机组在低气温环境条件下性能稳定可靠。
In this paper, the concept of frost critical temperature of fresh air is put forward. And computing model is set up.
本文提出了结霜临界新风温度的概念，并建立计算模型，求解了不同条件下的结霜临界新风温度。
The temperature distribution in the refrigerator is a main index to evaluate the optimum design of frost-free refrigerators, which is closely relative to the flow field.
冰箱内温度分布是间冷式冰箱结构优化设计的主要评价指标，而温度分布与流场紧密相关。
According to the meteorological observation in Minqin Desert Control Experiment Station, variations of frost-free period, low temperature in spring and frozen earth were analyzed.
以甘肃民勤治沙综合试验站数十年气象定点观测资料为基础，统计、分析了民勤荒漠区无霜期、春季低温、冻土层的变化特征。
China has a mild temperature, with frost and dew. On the right are plateaus, and on the left are great seas.
我国气候冷暖匀称而有霜露。右边是高原，左边是大海。
According to the model, the temperature distribution of the frost free heat exchange is simulated.
运用该模型，模拟了一种液氮发动机主换热器的动态温度分布。
Under the conditions of the high air temperature and humidity, the average frost density is raised significantly due to the appearance of the water droplet on the frost layer surface.
而对高温、高湿度工况，霜层表面出现了首先形成凝结水滴的现象，使得霜层密度大大增加。
The effects of the outdoor air temperature and humidity on the frost morphology and density of the frost layer were analyzed.
对一台空气源热泵翅片管蒸发器表面结霜特性进行了实验研究，分析了室外环境温度和相对湿度对霜层形态和密度的影响。
The experiment also shows that after the concrete strength reach the frost-resisting critical strength, its strength and elasticity module will increase slowly with the decrease of the temperature.
试验还表明，当混凝土强度达到受冻临界强度后，随着负温值的增大其强度缓慢增长，弹性模量也有缓慢增长。
An experimental study on the performance of freeze-dryer's cold trap has been carried out under different temperature of the cold trap coil and different frost thickness in the paper.
对影响冻干机冷阱传热性能的两个因素(冷阱盘管壁面温度和结霜厚度)进行了实验研究。
In this paper, based on the experimental results, a series of frost damage index to Chinese cabbage in the plateau field are established and a simulating equation for minimum temperature is proposed.
根据试验结果的分析，确定高原露地大白菜霜冻指标，并建立了菜地最低温度模拟方程。
This paper expounds the test results of the freezing Process of sea water, the excessive cold temperature of sea water, the frozen water temperature, sea water frost heaving force and the tube strain.
文中介绍了管内海水冻结过程、海水过冷温度、结冰水温、轴向冻胀力以及管体应变测量结果。
In some areas, a positive correlation existed between first frost with air temperature, and had no obvious responses to precipitation.
部分地区初霜对气温正相关显著，绝大部分地区初霜对降水略呈增多变化响应不明显。
The relationship between frost injury to pear blossoms and low temperature were studied through laboratorially simulated frost injury experiment.
通过霜冻害模拟试验，研究了梨花霜害与低温的关系。
The sunshine duration is long, the temperature difference is big, the frost-free period is long, and the annual solar radiation amount is much, which is good for the growth of crops.
日照时间长，昼夜温差大，无霜期长，年太阳能辐射量大，对农作物生长十分有利。
The low temperature and frost are key factors of the survival of tropical rare and endangered plants in Guangxi. Therefore, more attentions must be paid for cold preventing and the …
低温和霜冻是广西热带稀有濒危树种能否成功保存的主要限制因素，因此，在引种保存过程中要注意防寒和树种的选择，以提高迁地保护的有效性。
With the change of environmental temperature, the air sourced heat pump water heater will frost in winter and the low pressure will be too high in summer.
随着环境的变化，热泵热水机将出现冬季结霜，夏季出现低压压力过高的现象。
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