几何级数

geometric series

small table

almost

how much / how many / several / a few

geometry / (literary) how much

surname He

what / how / why / which / carry

level / grade / rank / step (of stairs) / CL:個|个[ge4] / classifier: step, level

(math.) series

to count / to count as / to regard as / to enumerate (sb's shortcomings)

number / figure / several / CL:個|个[ge4]

frequently / repeatedly

exponential increase