重叠概念说明

[计] overlapping concept description

chóng dié gài niàn shuō míng ㄔㄨㄥˊ ㄉㄧㄝˊ ㄍㄞˋ ㄋㄧㄢˋ ㄕㄨㄛ ㄇㄧㄥˊ