And the question is gonna say something like this: Using the main points and examples explain clinal variation.
请利用中心思想和事例来解释梯度变异。
TED演讲（视频版）双语精选
We conducted this analysis using our data, and we found that genetic variations explain only 15 percent of the differences in life span between individuals.
我们使用数据执行了这个分析，发现遗传变异只解释了15%的个体寿命差异。
iBT新托福突破口
But today I’d like to talk a little bit about other theories that can explain variations in climate.
但今天我想谈谈其他可以解释气候变化的理论。
英语百科
Explained variation
In statistics, explained variation measures the proportion to which a mathematical model accounts for the variation (dispersion) of a given data set. Often, variation is quantified as variance; then, the more specific term explained variance can be used.