近年来

Development and application of coal tar deep process in the world in recent years were introduced, and problem and developmental tendency for deep processing of coal tar in China were pointed out.

综述了国内外近年来煤焦油深加工及其产品应用研究的发展进程，指出了我国煤焦油深加工存在的问题和发展方向。

Coalification has been one of focuses for coal geology and the organic geochemistry, in recent years, with the development of coal-generated hydrocarbon and coal bed gas, understanding of the mechanism of coalification is especially important.

煤化作用一直是煤地质学、有机地球化学等学科的研究内容之一，尤其是近年来随着煤成烃及煤层气等相关问题的开展，煤化作用机理的研究显得尤为重要。

Beibu Gulf Region, is a developing rapidly region in these years and the only coastland region in Western China.

北部湾经济区，是近年来发展迅速的一个沿海经济区，也是中国西部唯一的沿海区域。

In this paper the structure and coloration mechanism of spinel cobalt blue pigment s are introduced.

介绍了尖晶石型钴蓝颜料的结构和显色机理，结合纳米材料的制备方法，综述了近年来钴蓝颜料制备方法及工艺，主要有固相反应法、液相反应法、气相法。

Recently,due to the development of coccidiosis immunity researcb,ccli-mediated immunity is considered a protective role against coccidia infection.

近年来，随着鸡球虫病免疫机制研究的深入，T细胞介导的细胞免疫被认为具有保护作用。

The analysis of the detecting result showed that the incidence of piglet coccidiosis in Leshan increased in recent years.

对检测的结果进行分析可知近年来乐山仔猪球虫病发病率有所升高。

The analysis of the detecting result showed that the incidence of piglet coccidiosis in Leshanincreased inrecent years.

对检测的结果进行分析可知近年来乐山仔猪球虫病发病率有所升高。

In 1981, Cockayne proved that the calculation of the domination number on arbitrary graph was a NP-hard problem.

图的支配问题是近年来图论中一个比较活跃的研究领域，有很多实际的应用。1981年Cockayne等人证明计算任意图的支配数是一个NP困难问题。

In this paper, a fast fractal coding algorithm based on convolution theory is presented.

近年来，分形图像压缩编码技术因其潜在的高压缩比而引起了人们的广泛兴趣。

In recent years, the codling moth Laspeyresia pomonella has spread from the Hexi Corridor to inland apple production areas of China, and the pest situation is serious.

苹果蠹蛾近年来正从甘肃河西走廊向内地蔓延，形势十分严峻。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。