算术比

arithmetical───adj.算术的；算术上的

arithmetically───adv.算术上；[数]用算术方法

arithmetic mean───算术均数；等差中项

arithmetic meaner───算术平均数

arithmetic means───算术平均数

arithmetic series───[数]算术级数，等差级数

arithmetician───n.算术家

arithmeticians───n.算术家

arithmetic progression───等差级数，等差数列；[数]算术级数，算术数列

Population, when unchecked, increases in a geometric ratio . Subsistence increases in an arithmetical ratio.───人口, 如果不加抑制, 就会以几何级数增长. 而生存给养是以算术级数增长的.

when unchecked, increases in a geometrical ratio. Subsistence only increases in an arithmetical ratio.───人口在不加抑制时以几何比率增长。生活资料仅以算术比率增长。

Population, when unchecked, increases in a geometric ratio . Subsistence increases in an arithmetical ratio.