filler replacement

例句：

1. 1. The new car has a more advanced fuel-efficient engine that replaces the old one as a filler.
   这款新车拥有更先进的高效能发动机，可以替代旧款作为填充。
2. 2. The company is replacing its aging inventory with new, higher-quality fillers.
   该公司正在用新的、质量更高的填充物替换其老化的库存。
3. 3. In order to improve the performance of the engine, the manufacturer replaced the old filler with a new one.
   为了提高发动机的性能，制造商用一个新的来替换旧的填充物。