Pollen and ash remains show that 2000 years ago the Mayans were growing maize with slash-and-burn agriculture in some areas that over the course of later centuries became permanently flooded wetlands.
从遗留的花粉和草木灰可看出距今2000年前生活在那里的玛雅人还在那里种植玉米，虽然种植方式还处在刀耕火种的原始方式，但那里毕竟还有土地。可是在随后的几百年里，这片土地已成了永久性的洪涝之地。
The cement fly ash is a base course material for pavement that has the advantage of both cement and fly ash stabilized granular.
水泥粉煤灰路面基层是一种兼有水泥和二灰稳定粒料优点的路面基层材料。
Of course we say grey series is not only refers to smoke gray, but includes red, yellow, blue, grey ash, ash.
当然我们说的灰色系列不是单指烟灰色，而是包括红灰、蓝灰、黄灰等在内的。
The sulfur amount of fly ash has a substantial influence on the intensity and stability of road base course.
粉煤灰含硫量对路面基层的强度和稳定性有重要影响。
At the same time a series of the color of the ash of course is also very popular in recent years.
同时这一系列的灰当然也是近几年相当流行的颜色。
As for the questions during the course of utilizing fly ash in our country, the dissertation has put forward some managerial countermeasures from the macroscopic middle level and microcosmic angles.
文章在最后针对我国粉煤灰利用过程中的问题从宏观、中观、微观三方面提出了一些管理对策。
During the course of that week, at different places along the coast, his seventeen sons were hunted down like rabbits by invisible criminals who aimed at the center of their crosses of ash.
随后整整一个星期，在海边不同的地方，奥雷连诺的十七个儿子都象兔子一样遭到隐蔽的歹徒袭击，歹徒专门瞄准灰十字的中心。
During the course of that week, at different places along the coast, his seventeen sons were hunted down like rabbits by invisible criminals who aimed at the center of their crosses of ash.
随后整整一个星期，在海边不同的地方，奥雷连诺的十七个儿子都象兔子一样遭到隐蔽的歹徒袭击，歹徒专门瞄准灰十字的中心。
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