珠算 abacus
UNESCO added the Chinese abacus to its World Intangible Cultural Heritage list
联合国教科文组织将珠算列入世界非物质文化遗产名录。
Abacus contributes to the advancement of calculating techniques, educational psychology and intellectual development.
珠算有助于提高运算技巧，改进教育心理和提高智力水平。
