" To get something down to" means to reduce the number of something.

” “to get something down to” 意思是减少某物的数量。

After making their list of people, Anne and Bill " got the list down to two prime suspects." " To get something down to" means to reduce it, to make it less.

列出人员名单后，安妮和比尔“将名单归结为两个主要嫌疑人” 。