当头盘系统发生碰撞时，冲击激励峰值加速度与作用时间的倒数之间具有近似线性关系。
When the head disk collision occurs, the peak acceleration of the shock pulse approximately follows a linear relationship with the inverse of the excitation duration.
暖空气经常更轻一些，因为分子受到热量的激励而四处碰撞。
War(warm?)air is frequently lighter as the molecules bump around, excited by the heat.
在约60至200英里上空，粒子与地球大气层发生碰撞，受到电气激励——发出各种颜色的光线。
About 60 to 200 miles overhead, the particles bump into the Earth's atmosphere and become electrically 'excited' - throwing off light of various colours.
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