密度: density; thickness变化: change; variety; transformat ...骨密度变化: skeletal density change密度变化区: density transition zone横向密度变化: lateral density variation密度变化边界: density-change boundary密度变化方程: density-change equation密度变化效应: change of density effect; changeofdensity effect年龄密度变化: age density change密度变化测定法: density change method长度变化: change in length; changeinlength; length change分度变化量: index variation幅度变化: amplitude of variation; amplitude variation高度变化: altitude change; altitude variation高度变化率: rate of change in altitude高度变化图: height-change chart光强度变化: variation in light intensity厚度变化: variation in thickness角度变化: angular change; angular variation进度变化: schedule variance经度变化: variation of longitude孔隙度变化: porosity variation宽度变化: width variation粒度变化: change in particle size亮度变化: brightness variations