Abacus

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目录 1 解释 1.1 GRE 红宝书 1.2 Webster Collegiate 2 记忆 3 出现过的地方

[编辑] 解释

[编辑] GRE 红宝书

• n. 算盘
• ［类］ abacus: calculate / sextant: navigate ( 算盘用来计算 / 六分仪用来航海)

[编辑] Webster Collegiate

noun (plural abaci or abacuses)

• Etymology: Latin, from Greek abak-, abax, literally, slab
• Date: 14th century
• 1. an instrument for performing calculations by sliding counters along rods or in grooves
• 2. a slab that forms the uppermost member or division of the capital of a column

[编辑] 记忆

[编辑] 出现过的地方

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