This pape probes to the stage-structure systtm with nonlinear fertility rate, making clear the ample conditions of the systtm's global stability of the equilibriums.
研究具有非线性生育率的阶段结构系统，得到了该系统平衡点全局稳定性的充分条件。
2
There's ample feel for touch shots and enough stability and pop to punch volleys away with pace.