A is an Abacus, the ancient Chinese adding machine which uses beads for counting.
A is an Abacus, the ancient Chinese adding machine which uses beads for counting.
是一个利用珠子进行运算的东西，叫做算盘，别看它不起眼，它可是古代中国最重要的，用来计算的工具。
A is an Abacus, the ancient Chinese adding machine which uses beads for counting.
是一个利用珠子进行运算的东西，叫做算盘，别看它不起眼，它可是古代中国最重要的，用来计算的工具。