(of bad thing) to increase rapidly or exponentially; to grow like rabbits breeding

(biology) bacteria, bacterium

to increase (in numbers, quantity, or volume)

A common word problem in Japan. It says that "In January, there is a pair of mice. They copulate and bear twelve children. The next month, 7 pairs of mice copulate and bear twelve children respectively. How many mice are there in December?"

ceremony, ritual, function / type, style / (mathematics) a formula or expression

formula, expression / ceremony / style

ceremony / style / formula / method / system / ritual / pattern / model

(phonetics) monotone style:

graduation ceremony

coming-of-age ceremony; celebrated at the age of twenty.