exponential
/ˌekspəʊˈnenʃəl/adjective
1- Mathematics of or expressed by a mathematical exponent【数】指数的; 用指数表示的：
an exponential curve.
指数曲线。
1.1
- (of an increase) becoming more and more rapid（增长）越来越快的：
the social security budget was rising at an exponential rate.
社会保障金的预算正以越来越快的速度增长。
派生词
exponentially
adverb词源
early 18th cent.: from French exponentiel, from Latin exponere 'put out' （see EXPOUND）.