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Stone coal is a low-grade coal, with low heat value, high sulfur and ash contents.

循环流化床燃烧[2]作为一种高效的洁净煤技术，近年发展较快，该技术的一大优点就是适宜燃用石煤、垃圾之类的低热值燃料。

Economy is still in very good shape (with low inflation, low interest rates, and moderate economic growth ), and that is enormously important to the rest of the world," says Strabo."

Strabo 说，除此之外，巴西的经济并没有如许多人所恐惧的那样

Conventional relay testing instrument has many defects such as low-density of integration, high straggle of parameters, unreasonable placement of structures, semiautomatic testing, low precision and reliability, and specificity.

传统的继电器测试仪有很多的缺点，如集成度低、参数离散性大、结构布局缺乏合理性、多采用半自动测量、精度和系统可靠性都很差，而且能测的继电器型号单一。

In the first part, the opinions and ideas from some main figures concerning the North-western regions in modern history; In the second part, the process of three vital stages(Yang-Wu Movement, the "New Deal" in the last period of Qing Dynasty, Anti-Japanese War) are studied, and the characteristics of each stage are generalized falling into four categories, such as: military、feudal、comprador and nation-monopoly etc; In the third part, four reasons of the low efficiency of the industrial and mineral exploration are explored, they are the dominant role natural economy, the low level of productive forces, the science and technology, lack of capital accumulation and investment, lack of systematic policies and support from the government, In a word, as Mao Tsetung said:"It"s impossible to get rich, develop industry, strengthen national defence in semi-colonel and semi-feudal China.

全文共分四部分，第一部分论述了近代一些主要的阶级关注西北的言论和思想；第二部分对西北近代工矿业开发的三个最重要的阶段，即洋务运动时期、清末"新政"时期、抗日战争时期的开发过程做了梳理，并对每一个阶段的特点做了初步地概括，大致可以归纳为军事性、封建性、买办性以及国家垄断性等；第三部分对西北近代工矿业开发成效不高的原因做了论述，主要有四点：第一，小农业与家庭手工业紧密结合的自然经济占统治地位；第二，生产力水平低下，科学技术落后；第三，缺乏资金的积累和投入；第四，缺乏政府系统的政策支持和保障。

He weared a suit of low gray bottom and low blue stria, weared a rose color tie.

他穿一身浅灰色底子淡蓝色条纹的西装，打着一条玫瑰红的领带。

Nowadays, with the short supply and the rising price of the international crude oil, the energy problem is very urgent, and it has been becoming "energy crisis" gradually. In addition to the increasing strict exhaust laws,diesel engine has been forced to low pollution, low oil consumption and promote the ratio power.

当前能源问题已经十分紧迫，随着市场供应的不足和国际原油价格的不断上涨，逐渐演变成"能源危机"；加上日益严格的排放法规，迫使柴油机朝着低污染、低油耗和高比功率的方向发展。

Stylo is one of the most important forage legumes in tropical and subtropical area, and well adapted to low-phosphorus acid soils. However, its physiological mechanisms in adaptation to low- P acid soils have not been well studied.

柱花草是世界热带、亚热带地区广泛种植的高产豆科牧草之一，对酸性低磷红壤具有较好的适应性，但其适应性机理尚不清楚。

The higher subduction velocity advantages the low temperature in the subduction belt. In addition, it takes less time for the crust rock to subduct the deep and then return to shallow. The low temperature and the short time are benefit to forming and reserve the ultrahigh\|pressure metamorphic rocks.

板块持续的高速俯冲，不仅可以使得俯冲带形成低温环境，而且在陆壳岩石俯冲到地幔经受超高压变质作用后返回地表浅部的过程中，超高压变质岩在地幔滞留的时间短，为超高压变质岩的形成提供了必要条件。

Low-level noise can cause higher probability of subjective annoyance. It"s very slightly to people"s health, sleeping and working about the low frequency noise. It was compared with the high frequency noise caused by traffic about sleep, work and rest.

研究结果表明：居住区低频低噪声引起的烦恼度不容忽视，在低频低噪声环境下仍能引起较高的烦恼概率；低频低噪声对人的睡眠、行为及主观生理不适感有影响；低频噪声烦恼度与中高频噪声烦恼度的研究结果在对睡眠、工作及休息上有差异。

In recovering a low dimensional parametrization of data lying on a low dimensional submanifold in high dimensional space, we need to understand and grasp the structure of image of the Laplacian Eigenmap.

在揭示建立在高维数空间中的一个低维子流形中的一个低维数的确定参数时，我们需要去了解并领会拉普拉斯特征映射的像的构造。

This paper discusses design and realizable methods of remote test output interface from logical design angle.

本文从逻辑设计的角度讨论遥测输出接口的设计及实现方法。

This also 星体投射plies to buildings, structures and geological features.

这也适用于建筑物和地质特征。