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/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。