Language Point 28

...a Russian nesting doll with five progressively smaller figures inside. (Para. 10)

progressively: in a way of going from one to the next; step by step; bit by bit

My sight has got progressively worse over the years. 这些年来，我的视力越来越差。

The amount of the loan from the bank was progressively reduced. 银行的贷款越来越少。