中文词 · Chinese word
保长
bǎo cháng — (math.) distance-preserving; isometric
bǎo zhǎng — head of a bao 保[bao3] in the baojia 保甲[bao3 jia3] system
中文词 · Chinese word
bǎo cháng — (math.) distance-preserving; isometric
bǎo zhǎng — head of a bao 保[bao3] in the baojia 保甲[bao3 jia3] system