sliding motion

• 滑动,滑移运动

sliding motion的用法和样例：

例句

1. Fees is calculated on a sliding scale according to income.
   这种费用是根据收入高低滑动折算的。
2. If the oxide film is hard, sliding occurs on the outside thereof.
   如果氧化膜较硬，则滑动在它们的外面发生。