片语
ready reckoner简便计算表
Sand-Reckoner沙数计量
The Sand ReckonerThe Sand Reckoner () is a work by Archimedes in which he set out to determine an upper bound for the number of grains of sand that fit into the universe. In order to do this, he had to estimate the size of the universe according to the contemporary model, and invent a way to talk about extremely large number
stepped reckonerThe Step Reckoner (or Stepped Reckoner) was a digital mechanical calculator invented by German mathematician Gottfried Wilhelm Leibniz around 1672 and completed in 1694., pp.
HASIB RECKONER可依靠者
counter反击,还击;反向移动,对着干;反驳,回答
calculator计算器;计算者
ALHASIB RECKONER可依靠者
liquidator reckoner清算人