急剧地
6.To reduce sharply the population of, as by disease, war, or forcible relocation.
8.Over the past decade the number of hazy days has increased dramatically most years (see chart).
9.The wheels churned up the mud in the road as the driver tried desperately to extricate his car.
10.The dollar has weakened sharply, raising the spectre of the complete collapse that bears have been predicting for years.

