【化】 自然极化

利用电极化的边界屏蔽近似，可计算出一些典型铁电单晶的自发极化强度.铁电屏蔽电荷处于表面束缚极化子偶状态,其产生和湮没要跨越位垒.由统计方法给出的一些常见晶体和陶瓷的四种典型电滞回线形状，和实验观察到的结果一致.

spontaneous generation

spontaneous

spontaneous vaginal delivery

spontaneous reporting system voluntary

Inability to Sustain Spontaneous Ventilation

spontaneous reaction

spontaneous harmonization of yin1 and yang2

blood ejection and spontaneous external bleeding