变化率用英语怎么说？

变化率

• change rate，rate of change，variance ratio

例句

• The changing rates of baselines reflected crustal motion of different sites. 基线长度变化率反映了测站间的地壳运动情况.
• He now called a varrable quantity a fluent and its rate of change , the fluxion. 他现在把变量叫做流,变量的变化率叫做流数.