查询词典 Napier's bones

Napier's Bones, An Early Calculation Aid

奈培的方块，一个早期的计算助手

Invented in 1617 by Scotsman John Napier, Napier's Bones was a set of rectangular bones marked off with numbers at the top of the face and multiples of that number down the face of the tile. Analyze

由苏格兰人约翰奈培在1617年发明，奈培的方块是一个在牌的正面的上方有标示号码，而且在牌的正面的下方有著那个号码的倍数的矩形方块，的集合

The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell; to add more complex calculations, a set of Napier's bones were mounted on it.

当定位齿轮朝9转动时，棘爪便逐渐升高；一旦齿轮转到0，棘爪就"咔嚓"一声跌落下来，推动十位数的齿轮前进一档。

The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell; to add more complex calculations, a set of Napier's bones were mounted on it.

当定位齿轮朝9转动时，棘爪便逐渐升高；一旦齿轮转到0，棘爪就&咔嚓&一声跌落下来，推动十位数的齿轮前进一档。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。