The composition of US production today is not the same as in the early 1970s, in that it has a higher proportion of NGLs, which have a lower energy content and value than crude oil. 如今,美国石油产品的构成和上世纪70年代初并不相同,其中天然气凝析液所占的比重较大。与原油相比,这种天然气凝析液所含的能量较低,价值也不如原油。
Meanwhile, in terms of energy content, a barrel of crude oil is worth 1.4 barrels of NGLs. 与此同时,1桶原油所含能量相当于1.4桶天然气凝析液。
Collection of digesta is the main factor influencing the representative of metabolizable energy content of feedstuffs estimated with in vitro method. 食糜的采集是离体法测定代谢能值的方法中影响其代表性的主要因素。
These various forms differ in their thermodynamic energy content, but not in composition. 这些不同的形态有不同的热力学能,组成无差异。
The general approach commonly adopted by most nutritionists is to measure the energy content. 被大多数营养学家所普遍采用的一般方法是去测定能量含量。
Biogas construction is an important development strategy of China's energy content, which have achieved remarkable results. 沼气建设是中国能源发展战略的重要内容,已取得举世瞩目的成效。
According to the new guidelines, the labels must contain the nutritional composition of the product and its energy content. 根据新的指南,标签必须包含产品的营养成分和能量的含量。
The explosive potential ( energy content per unit mass) of hydrogen is about twice that of the methane in natural gas. These small, suicidal creatures are filled with explosive chemicals and corrosive acids. 氢的爆炸潜能(单位质量含有的能量)大约是天然气中甲烷的两倍。这些“毒瘤”是自杀单位,它们体内充满了爆炸性化学成份和酸性物质。
The energy content of fuels is directly related to the mass and not volume. 与燃料的发热值直接有关的是质量而不是容积。
Energy content of fuel is obtained in most cases in an adiabatic, constant volume bomb calorimeter. 能源燃料的内容是,在大多数情况下取得的绝热,定容弹热量。
Its energy content is used to perform work. 它的能量被用来做功。
Nutritional value is a measure of the ratio of vitamins and minerals to energy content of food. 营养价值就根据食物中的维生素和矿物质转化为热能的量来定义的。
The energy content of the food an animal eats is liberated by its metabolic processes. 动物所吃食物中的能量是通过它的代谢过程释放出来的。
Energy Content Analyses of Coal Product from Coal-mine to Consumer 煤炭产品从矿井到用户的能源含量分析
The energy content and their seasonal variations of Arachnida in arid environment were studied. 研究干旱地区蛛形纲动物的含能值变动规律。
Body energy content increased when protein and fat levels increased ( P < 0.01). 鱼体总能随着蛋白质和脂肪水平的提高也极显著提高(P<0.01)。
The dry matter content and energy content of the fish increased with increased ration. 鱼体的干物质含量及能量含量随摄食量增加而增加。
The effect of diet energy content on digestive enzymes activities was not significant, but the protein content changed amylase, trypsin and chymotrypsin activity. 日粮能量水平对鸭小肠液消化酶活性没有显著地影响,而蛋白质水平对小肠液中淀粉酶、胰蛋白酶、糜蛋白酶有显著地影响。
Three experiments were conducted to investigate digestive and utilizable performance of dietary nutritional matter in blue peafowl, and studied on the feasible protein and energy content in blue peafowl diet. 本研究通过三个试验研究了蓝孔雀对日粮营养物质消化利用性,并探讨了蓝孔雀日粮适宜的粗蛋白质和能量水平。
Chemical composition and energy content of Elodea Nuttallii were determined by common methods of biochemical analysis. 本文分析了伊乐藻的生化成分和能值,测定了草鱼、团头鲂对伊乐藻生化成分的消化率,草鱼对伊乐藻的最大摄食量、蛋白质利用率和饲料系数。
Skinks of the three groups differed significantly in body wet mass, body dry mass, lipid mass and energy content but not in ash mass. 三组石龙子的湿重、干重、脂肪质量和能值差异显著,但灰分质量无显著差异;
In this paper, we discuss the problem of the local energy content in gravitational fields. 本文讨论引力场中局部区域的能量问题。
There was no significant difference between the energy content of Scorpionida and that of Araneae, their mean energy content was 21.32 J/ mg ash free dry weight. 蛛形纲蝎目和蜘蛛目动物含能值之间的差异不显著,平均含能值为21.32J/mg无灰干重。
Energy content of per kilogram weight loss of yak and sheep was much higher in winter than in spring. 牦牛和高山细毛羊在冬季每千克减重的能量水平远高于春季。
The mechanism of Acoustic Emission phenomenon in cutting process is studied. A analytical model relating the acoustic emission signal energy content to the cutting process parameters in orthogonal metal cutting is presented. 研究了金属切削过程的声发射机理,建立了正交切削条件下的金属切削过程声发射理论模型,即声发射信号能量与切削参数间的关系模型。
Significant variation of energy content was found among the life forms ( p0.01). 8. 不同生活型之间其含能量有显著差异(p<0.01)。