月球哥白尼纪次级坑的形态特征及其空间分布
张珂, 刘建忠, 程维明

Morphological features and spatial distribution of the lunar Copernican secondary craters
Ke ZHANG, Jianzhong LIU, Weiming CHENG
图4 不同次级坑直径、次级坑分布距离下与次级坑数量占比的关系
Fig.4 Relationship of secondary crater number with different secondary crater diameter and distance