tub liner

例句：

1. 1. The new bucket liner is much sturdier than the old one.
   新的桶衬比旧的桶衬要结实得多。
2. 2. We used to use a bucket liner to keep our water clean.
   我们过去用桶衬来保持我们的水清洁。
3. 3. The bucket liner was made of thick rubber and could stretch to fit any size bucket.
   这个桶衬是用厚橡胶制成的，可以拉伸以适应任何大小的桶。