bottomless pit

/ˌbɒt.əm.ləs ˈpɪt/

something that seems to have no limits, or a situation that will never end

无底洞;无休止的情形

We'll be pouring money into a bottomless pit if we try to keep that factory open.

如果继续让那个工厂运转下去，我们无异于把钱投入无底洞。

Pinocchio did not eat; he devoured. His stomach seemed a bottomless pit.

皮诺乔不是吃，而是狼吞虎咽。他的胃像一个无底洞。