2022年3月7日
suanpan
摘要： The suanpan (simplified Chinese: 算盘; traditional Chinese: 算盤; pinyin: suànpán), is an abacus of Chinese origin first described in a 190 CE book of the 阅读全文
posted @ 2022-03-07 23:17 华容道专家 阅读(340) 评论(0) 推荐(0)