月经停止

alternation of generations───[生物]世代交替

equation of state───[物化][自]状态方程式

equation of states───[物化][自]状态方程式

cessation of violence───停止暴力

clear demonstration───清晰的演示

constant of integration───[数]积分常数

context of situation───语言环境；情景上下文

heat of condensation───[热]冷凝热；[热]凝结热

mass demonstration───大规模的游行示威

The period marked by the natural and permanent cessation of menstruation, occurring usually between the ages of45and55.───绝经期月经自然性永久停止的时期，常常发生于45岁至55岁之间