concave convex是什么意思及反义词

concave convex 英[kɔnˈkeɪv ˈkɔnˌveks] 美[kɑnˈkev ˈkɑnˌvɛks][词典] 凹凸;[例句]Average degree and height of concave convex boundaries can be an indicator for the expanding and contracting process of the t...