The chinese invented the abacus ; india invented the binary and the decimal systems .
中国人发明了算盘；而印度人发明了二进制及十进制算法。
When students mastered the abacus , they developed more confidence in their ability to do math .
学生学会了算盘，提高了他们学习算术的信心。
China , which invented the abacus as we know it today , should tell its statisticians to fix theirs .
正如我们今天都知道的，中国，是它发明了算盘，那么它也应该让它的统计员们正确地使用他们的算盘。
Such fine calibrations may date back to the use of the abacus , and to an old chinese convention that assumes a 360-day year for the purpose of reckoning interest payments .
