They also learned to use the abacus.他们还学习珠算。Except for the sharp clicking of Chueh - hsin's abacus counters, all was still.房里只有算盘珠子的接连的 、 清脆的响声.operate an abacus打算盘use an abacus打算盘She can reckon rapidly on the abacu...
Except for the sharp clicking of Chueh - hsin's abacus counters, all was still.房里只有算盘珠子的接连的 、 清脆的响声.The abacus is the ancestor of the modern computer.算盘是现代电脑的原型.She can reckon rapidly on the abacus.她用算盘算得很快....