根据卷吸机理不同，可将通道内烟气蔓延过程分为四个不同阶段。
Based on the different entrainment mechanisms, the smoke movement in a long channel can be divided into four stages.
所以现阶段对付这种不断蔓延的病毒最好的武器还是良好的性教育和一些防止病毒的项目。
So at this stage to deal with this continuous spread of the virus best weapon or a good education and a number of projects to prevent the virus.
寄生虫的蔓延预示着不良卫生环境，所以灾民安置后期阶段应对卫生状况加以改善以解决肠道寄生虫问题，同时也有利于减少其它严重疾病的发生。
Because reinfestation after treatment is an indicator of poor sanitation, correction of sanitary deficiencies is likely to abate the parasite problem and other, more serious diseases.
寄生虫的蔓延预示着不良卫生环境，所以灾民安置后期阶段应对卫生状况加以改善以解决肠道寄生虫问题，同时也有利于减少其它严重疾病的发生。
Because reinfestation after treatment is an indicator of poor sanitation, correction of sanitary deficiencies is likely to abate the parasite problem and other, more serious diseases.
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