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关注：1
2013-05-23 12:21
求翻译：An abacus, also called a counting frame, is a calculating tool used primarily by Asians for performing arithmetic processes. Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone, or metal. The 是什么意思？ 待解决
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An abacus, also called a counting frame, is a calculating tool used primarily by Asians for performing arithmetic processes. Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone, or metal. The
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2013-05-23 12:21:38
[object Object]
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2013-05-23 12:23:18
正在翻译，请等待...
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2013-05-23 12:24:58
正在翻译，请等待...
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2013-05-23 12:26:38
An abacus, also called a counting frame, is a calculating tool used primarily by Asians for performing arithmetic processes. Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, s
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2013-05-23 12:28:18
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