255. While I might adapt my list to what's on sale—maybe swap out a movie title or choose a different video game based on what is available.
译文而我或许会根据促销情况来调整自己的清单——可能根据可选择的物品来换掉一部电影，或是选择一款不同的电子游戏。
点睛本句的主干是I might adapt list。句首的while表示与前文内容的轻微转折关系；破折号之后的内容是对adapt的具体说明，其中based on what is available为swap out和choose的状语，而what is available是介词on的宾语从句。
adapt...to的意思是“使……适应、适合”。如：
It took me quite a while to adapt myself to the new surroundings. 我花了好一阵子时间才适应新的环境。
on sale此处的意思是“折价销售，减价出售”。如：
All instruments are on sale today and tomorrow. 所有乐器今明两天降价出售。
swap out的意思是“换掉”。如：
Many high schools swap out textbooks this year. 今年许多中学都换了教材。
考点归纳sale意为“销售，出售”，与其相关的常见短语有：
make a sale意为“卖出，做成一笔买卖”。如：
Every time you make a sale, you will get $20 commission. 你每做成一笔生意就会得到20美金的佣金。
for sale意为“待售”。如：
They put their old house up for sale. 他们着手出售自己那栋老房子。
on sale还可指“上市，出售”。如：
Tickets are on sale from the booking office. 售票处正在售票。
