它将最终使人口增长速度放缓，并保持稳定。
It will eventually lead population growth to slow down and stabilise.
压缩空气在磁场作用下产生的等离子体可以点燃煤粉并保持稳定燃烧。
The plasma generated by compressed air in magnetic field can ignite pulverized coal and keep stable burning.
使横接缝的质量得到提高并保持稳定，满足了路面平整度的设计要求。
Consequently, the quality of the transverse joint is raised and remained stable, which meets the demands of pavement evenness.
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