fill·er
noun/ˈfɪlə(r)/
/ˈfɪlər/
- [uncountable, countable] a substance used to fill holes, especially in walls before painting them
填充物，填料（尤用于漆墙前填孔或缝） - [countable] (informal) something that is not important but is used to complete something else because nothing better is available
充数的东西；填补空白之物 - The song was originally a filler on their first album.
这首歌在他们第一张专辑中本来是用来凑时间的。
see also stocking filler - The song was originally a filler on their first album.