population rate meaning in English

总体率

Comparative research on the higher educational population rate among the world most populous countries
世界人口大国高等教育人口比重的比较研究
We then discuss the vibrational - rotational level transitions and the population rate equations for the laser . in addition , electron temperature , electron density and the mixtured gas temperature in the laser plasma are investigated in details . the third part is with regard to the optimal designs and the experiments of the lasers
在二氧化碳激光动力学机理的研究中，比较详细地讨论了二氧化碳激光动力学过程，给出了激光振动-转动能级跃迁及其速率方程、激光等离子体电子密度和电子温度，以及混合气体的气体温度