取代,更换The calculator is rapidly replacing the abacusrepresent 代表,象征To many local people these castles ～ a hundred years of foreign dominationrescue 营救,救援,搭救 ～ hostages held by the terroristsresent 怨恨 ～ those unfair commentsreserve 保留,储备 We’ll the ticket for you till...
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Leibniz Calculator|莱布尼茨计算器 莱布尼茨计算器是德国数学家戈特弗里德·威廉·莱布尼茨于1617年左右发明并于1694年完成的一种数字机械计算器。该名称来源于德国术语对其操作机构Staffelwalze的翻译,意为梯形...