sub-space enhancement的用法和樣例：
例句
- By decomposing the space of contact forces into four subspaces, a general formulation of contact forces is developed.
通過將接觸力空間分解成四個子空間，給出了接觸力的一般表達式。 - Based on methods of Density and Grid, this approach limits dense cells to the intersection of their sub-dimension dense cells, which shrinks the searched space.
該方法採用基於密度和基於網格的方法，將高維密集單元的搜索限制在子空間密集單元的交集中，縮小了搜索空間。
