再生速度 meaning in English

birth rate
recovery rate

Humans are spending nature s capital faster than it can regenerate
天然资源的再生速度，远逊于人类的耗用速度。
Main working principal is that the bottom scraper with low rotate speed impels materials to form circumfluence in the basin of machine , the impeller of rotor rotating with medium speed can not only add wallop to sand , but also can add shear force to the sand with scraper so that the sand can touch and scrub each other fast ; wind blasting is set to cool the hot sand , remove dust and strip the membrane so that fast speed of regeneration and top - grade used sand can be gained
主要工作原理是低速转动的底刮板推动物料在机盆内形成环流，中速转动的转子叶片既对砂子施以冲击力，又与刮板配合对砂子施以剪切力，使砂粒间快速接触和强烈摩擦，围圈设风带鼓风使热砂沸腾冷却除尘脱膜，从而达到再生速度快，回用砂质量好的目的。