Even though the bottom one takes up the least amount of space in this optical illusion, it is the flattest circle and therefore has the largest diameter.
尽管下面的圈看起来占的地方最小，但是它是最平坦的，也就是它的直径是最大的。
2
And during the inversion, two constrained models, flattest and smoothest model, were incorporated into the sensitivity matrix calculated by theoretical formula.
在反演过程中，根据理论公式计算迭代过程中灵敏度矩阵，并采用平坦模型和光滑模型两种约束。
3
THE flattest party conference season in many years ended with David Cameron's speech to the Conservative gathering in Manchester yesterday, which has received mixed write-ups.