multi-level average的用法和樣例：
例句
- The average at every time point of the fluctuant components separated by this method is zero.
運用這種方法，可以使分離出來的波動分量在每個時間點上的均值都為零。 - The plates lay a skinpass dieblock, at least to measure the thickness of the three places and calculates the average value.
不兵印版陡不收在一個裂縫檯面上，起碼丈量不一處的厚量並籌算陡均值。
