The elephant population in that area is falling. 那个地区的大象总数在下降。
The birth rate is the number of births compared to the size of the population. 出牛率是出生人数与人口总数之比。
An effective iterative algorithm for computing the closest dynamic oscillatory stability margin in full parameter space was proposed. 提出了全参数空间下的最近动态电压振荡型失稳边界的计算方法。
China's population continues to grow,the proportion of the aged is getting larger,and the pressure on employment and social security is mounting. 人口总量继续增加，老龄人口比重上升，就业和社会保障压力增大。
The Chinese population time series models have been formulated, but the Shaanxi population time series model has not been researched into. 对全国人口总量时间序列模型，已进行了一定的研究，对陕西省人口总量时间序列模型尚未研究。
