flatness problem

基本解释

In modern times, the problem shows the flatness of man.
而这一问题在现代显出人类空前的贫乏。
The problem is partly their flatness, as with Keds and Vans. However ballet pumps, which have no string or heel, have other specific problems.
和帆布鞋一样，虽然芭蕾鞋的问题也在于平底，但是由于其既无底又无绳，这就导致了另外一些特殊问题。
ysl47406.blog.163.com
In this paper, the mathematical model of flatness error is established. The theory of optimal approximation is used to analyze the theoretical problem of flatness error.
应用最佳一致逼近理论，从最小条件出发建立了评定平面度误差的数学模型，对评定平面度误差的理论问题进行了分析研究。