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An even more important aspect is that the whole process is natural. It is sourced from nature, executed with natural means, and culturally returned to nature without undesigable side-effects. Other dyeing technologies can be done in a simple fashion, how, many of them require at least a small amount of chemical adjuvant, thought even tin, can cause harm. Using mud, all the necessary chemistryReprint Statement: If there is no special explanation on this site, all articles are original. Please indicate the source for reprinting: Children's Programming Network, thank you! ^ ^这一会的工夫，那山溪水重新变得清洌起来，溪底的沙石和水草纤毫毕现，只是里面的鱼少了许多，剩下鱼孙子了。　　-According to the "12th Five-Year Plan" for the Construction of National Urban Domestic Waste Harmless Treatment Facilities, it is estimated that by the end of 2015, more than 300 domestic waste incineration power plants will be put into operation and under construction in China.1946年八年抗战刚刚结束。内战在东北一触即发。