煤

If the wood was buried and transformed into coal 250 million years ago and we burn it today, we are utilizing the energy stored by photosynthesis from late Palaeozoic sunlight.

如果树木是在2亿5千万年之前被埋藏然后变成了煤，我们今天烧这煤便是在燃烧由晚古生代阳光的光合作用储存的能量

Concentrations and distributions of rare earth elements in 226 Paleozoic coal samples from China were analyzed.

对全国晚古生代226个煤样中稀土元素的含量进行了统计，分析了煤中稀土元素的分布特征。

The simulation shows that particlesize and its distribution are the main influences factors of the particle movement.

针对水煤膏雾炬的扩散和颗粒运动的特点，采用直接模拟方法，建立了水煤膏喷雾雾炬的数学模型。

It is suggested that quite a lot of the Be, Co, Cu and Pb could be originated from the syngenetic stage during which the coal-forming plants grew. The strongly seawater-effected peat bog with the reductive and alkaline water could be in favor of the relative enrichment of the Be, Co and Cu, and the faintly seawater-effected bog with the slightly reductive and alkaline water could be in much favor of the enrichment of the Mn, Mo, Ni, P, Pb, Th, Tl and U.

认为凯里煤中相当一部分Be、Co、Cu和Pb起源于成煤植物生长期间的同生阶段；受海水影响强烈的还原偏碱性沼泽环境有利于Be、Co和Cu的相对富集，受海水影响微弱的弱还原性和弱碱性环境条件更有利于Mn、Mo、Ni、P、Pb、Th、Tl和U的富集。

The key techniques of this system are auto focus, auto exposure, texture analysis, pattern recognition and analysis of coal petrography.

该数字化煤岩分析系统是一个集显微图象采集、煤岩成分识别和煤质分析 3大功能于一体的综合性系统。

Digital coal petrography analysis system introduced in this paper is an integrated system that has three main functions: image acquisition, composition recognition and analysis of quality of coal.

为了能够快速准确地进行煤岩自动分析，设计了一个数字化煤岩分析系统。

Firstly, based on the interlaboratory comparisons of petrography of liquefaction residues the microscopic component of Shenhua coal liquefaction residue was deeply studied.

燃烧系统的设计和运行都必须以燃料的自身特性为基础，用热重差热同步分析仪研究了神华煤液化残渣和液化残渣水煤浆的热解以及燃烧特性。

Hydro-liquefactions of coal were carried out in a miniautoclave using diphenylmethane and phenetole as model compounds in tetralin solvent.

以二苯甲烷、苯乙醚为煤的模型化合物，以四氢萘为溶剂，进行中高压加氢液化实验，结合产物的气相色谱和质谱分析，考察了SO24-/ZrO2固体酸对煤直接液化的催化作用及加氢液化机理。

One 40 kilograms of coal , heading up to climb 100 meters from the coal pit, then walk 1000 more meter hill path, only earn 1 yuan.

一筐煤40公斤，从煤坑向上爬100米，然后再走1000米山路，只挣1元钱。

Muzimei carry a crate of coal (only 20 kilograms), climbing up 50 meters from the coal pit

试想一下：让木子美背一筐煤（只20公斤），从煤坑向上爬50米，再走500米她还能有那么大的。。。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。