蝙蝠侠在蝙蝠洞中修理他的战车。

Batman was fixing his Batmobile in the ___batcave.

他的书房简直像个蝙蝠洞，堆满了电脑零件和零食包装袋。

His study is like a ___batcave, filled with computer parts and snack wrappers.