He also notes that while hobbies offered relief from the old grindstone, they also occupied a space tied to productive leisure.

他还指出，虽然业余爱好能让人从旧的磨石中解脱出来，但它们也占据了与生产性休闲相关的空间。

Whatever had occupied the space had not been put in at random or in haste.

占据空间的任何东西都不是随意或匆忙放入的。

Namely, we imagine our predicted 3D geometry as a collection of small blocks, and each block is classified as either free space, occupied space, or as a surface.

也就是说，我们将预测的3D几何看作是许多个小块的集合，把每个小块分类为未占据空间、已占据空间以及表面。