abacus

名词 abacus:

1. a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave
2. a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves

1. The clerk reckoned the expenditure last week with an abacus.
   那位职员用算盘将上周的花销计算出来。
2. I can use abacus skillfully.
   我会熟练地打算盘。