The coal it produces is mostly poor in quality and rich in ash; it should be washed before shipping to make it more efficient, but is not.
它所产的煤炭大部分质量差而灰尘多；要想提高这些煤炭的效率，在装运之前应该要清洗但它们并没有被清洗过。
They concluded that iron-rich ash falling on waters that are otherwise poor in iron can create conditions in which phytoplankton thrive.
他们推断落在平时缺乏铁质的水面上富含铁质的灰尘为浮游植物的大量生长创造了条件。
These rocks consist of fossil-rich layers containing rapidly evolving Marine organisms such as ammonites, interleaved with layers of volcanic ash.
这些岩层富含化石，其中有快速进化的海洋生物，比如鹦鹉螺化石，岩层与火山灰岩交错排列。
The effect of slag, fly ash, and calcined shale on setting time, compressive strength, resistivity, composition and microstructure of hydrated product of alite-rich Portland cement were studied.
研究了矿渣、粉煤灰和烧页岩单掺及复掺对高阿利特水泥凝结时间、抗压强度、电阻率、水化产物组成及微观结构的影响。
Our country is in rich of fly ash, low grade fly ash received great limit because of its low activity, resulting in great waste of resources.
我国是粉煤灰资源大国，低等级粉煤灰由于活性低，在利用上受到限制，造成很大的资源浪费。
Experimental results identified that fluorine in coal belong to volatile elements, fluorine in fly ash and bottom ash were non rich.
结果表明：煤中氟属于强挥发性元素，在煤灰中是非浓集的。
The nearly black structures are almost certainly dunes made of volcanic ash-rich sediments.
近黑色的结构是几乎可以肯定的火山灰丰富的沉积物了沙丘。
Meanwhile, the ash is rich in certain elements, which are critical to modify the elements constitution of soil and increase the availability of N and K in usual situation.
根据目前研究情况，木灰肥用不但实现了元素循环，而且一定程度上提高和改良了土壤特性。
Meanwhile, the ash is rich in certain elements, which are critical to modify the elements constitution of soil and increase the availability of N and K in usual situation.
根据目前研究情况，木灰肥用不但实现了元素循环，而且一定程度上提高和改良了土壤特性。
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