abacus
Definition
A device consisting of beads or counters on wires used for performing arithmetic calculations
中文 用于算术计算的算盘装置
Example
"The ancient Egyptians used an abacus to calculate trade balances and taxes."
A device consisting of beads or counters on wires used for performing arithmetic calculations
中文 用于算术计算的算盘装置
"The ancient Egyptians used an abacus to calculate trade balances and taxes."