The process treating roast dust from zinc pyrometallurgy is,in general,the second roasting by rotary kiln.
处理火法炼锌高温流态化焙烧过程所产

,采
回转窑二次焙烧流程。
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Often, the evolution of this kind of camouflage is detectable on a shorter timescale too - the populations of dark-coloured peppered moths grew in England, for example, as sooty pollution increased in the 19th century during the Industrial Revolution.
通常来说,在较短一段时间内也能观察到伪装的进化发展——例如,19世纪工业革命期间,烟尘污染增加时,英国深色胡椒蛾的数量有所增加。