These three sets of chompers are located right outside the main door to the Medical Facility. You should pass them on your way to rescue Commissioner Gordon.
有三个假牙位于医疗中心主门正前面。你应该会在去救戈登警长的时候路过它们。
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On the other hand, if you're a poor US citizen, or you live in Brazil, you're much more likely to moralise and think the dog-chompers should be stopped in their tracks.