查询词典 natural gas

Methane is the primary component of natural gas.

甲烷是天然气的主要组成成分。

Methane is a principal component of natural gas.

天然气的主要成分是甲烷。

The present status of natural gas trade metrology at home and abroad is introduced.

介绍了国内外天然气贸易计量的现状，探讨了天然气贸易中调整统一天然气热值的

Mexico has a mixed economy based on agriculture, manufacturing, and the extraction of petroleum and natural gas.

墨西哥的混合经济以农业、制造业和石油开采为主。

Despite high storage levels and the relatively moderate winter weather thus far, the onset of seasonal natural gas demand for space heating has caused a steady increase in the monthly average spot price since September.

尽管库存处于高位，而且目前为止冬季气温相对温和，但进入采暖期所带来的季节性需求已促使天然气现货月度均价自9月份以来稳步攀升。

According to previous experimental data, it is found that the buoyancy and capillary force are effected by reservoir temperature and pressure, and the boundary height of natural gas coming-up so on.

根据前人的实验数据，通过理论计算发现，浮力和毛细管力均受地层温度和压力的影响，气体在储层中上浮的临界高度随地层温度和压力的降低而增大。

Productivity equation of natural gas well is established.

建立气井产能方程，初步确定火山岩气藏气井产量和无阻流量差异较大，气藏模型类型复杂多样，储层平面分布范围有限，多数压裂井附近存在不流动边界，因此，单井合理配产和控制边底水采出是高效开发徐深气田的重要手段。

The percolation equation of the natural gas and the rock body deformation equation have been discreted respectively to obtain their corresponding functional equation while the calculation method was derived and the coupled solution method was presented bas...

对天然气渗流方程和岩土体变形场方程分别进行离散，得到其相应的泛函方程。根据有限元法原理推出其计算方法，并给出耦合求解方法，这对于真实模拟气藏的开发，指导气田生产具有重要的意义。

Establish the steady-state and transient model using the three hydrodynamics equations (Continuity equation, Momentum equation and Energy equation). By comparing different state equation, it selects the BWRS state equation which is considered the most accurate state equation in current natural gas measurement. It calculates compression factor, density and other Thermal parameters based on BWRS state equation. In Numerical solution of the steady-state and transient model, compression factor, friction coefficient and all the other Thermal parameters are recalculated in each small time step to reduce the numerical calculation error.

在稳态模型的建立上，利用流体力学三大方程(连续性方程、运动方程和能量方程)，通过比较不同的状态方程选用了目前被认为最精确的用于天然气计量的BWRS状态方程，并以此方程为基础进行压缩因子、密度等热物性参数的计算；在稳态模型的求解上，选用容易计算，精度较高的标准型龙格—库塔(Runge-Kutta)法进行数值求解，并且在迭代过程的每一小步都重新计算燃气的压缩因子，摩阻系数等所有的计算参数，以减少数值计算的误差。

Laminar burning, velocities, mass burning fluxes and Markstein lengths were obtained at various ratios of hydrogen to natural gas and equivalence ratios, and flame stability was analyzed and the stability tendency was estimated when flames grow to larger sizes.

在定容燃烧弹内研究了初始条件为常温常压的天然气－氢气－空气混合气火焰传播规律，得到了不同掺氢比例和燃空当量比下混合气的层流燃烧速率、质量燃烧流量和马克斯坦长度，结合火焰传播照片，分析了火焰的稳定性并预测了大尺寸火焰稳定性的演变趋势。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。