It's hard to check up on people from inside a concrete cell.

‪在牢里蹲着 ‪哪有办法去查外面的事情。

It's also where, at any one time, there's likely 800 immigrants locked in freezing, filthy, concrete cells below the building.

在任何时候，也可能有 800 名移民被锁在建筑物下方冰冷、肮脏、混凝土牢房中。