Population is increasing in that country in a geometric progression.
那个国家的人口正以几
级数
长。
Population is increasing in that country in a geometric progression.
那个国家的人口正以几级数长。
The E optotype on the chart had 3 limbs of equal length.A regular geometric progression of optotype sizes and distribution was employed to arrange 14 lines with 4 optotypes on each line.
采
等长的E形视标，视标大
及排列采均匀的几
，每行视标数为4个，共14行，每两行视标变化进为拶而。
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